kubeadm: warn only when config value is different with default value
kubeadm: warn only when config value is different with default value

Compare with two pointers will always show that they are different value,
so it will always print the warning message.

Signed-off-by: Dave Chen <3fbbe9d8910afe5176d6dd2fc1de9e5729a30247@arm.com>

lojies/kubernetes,ping035627/kubernetes,csrwng/kubernetes,olivierlemasle/kubernetes,rnaveiras/kubernetes,cblecker/kubernetes,PiotrProkop/kubernetes,iameli/kubernetes,jackfrancis/kubernetes,mikedanese/kubernetes,cblecker/kubernetes,sdminonne/kubernetes,zhouhaibing089/kubernetes,alejandroEsc/kubernetes,rnaveiras/kubernetes,mengqiy/kubernetes,zhouhaibing089/kubernetes,mikedanese/kubernetes,mosoft521/kubernetes,jackfrancis/kubernetes,carlory/kubernetes,jackfrancis/kubernetes,spzala/kubernetes,alejandroEsc/kubernetes,dims/kubernetes,mkumatag/kubernetes,zhangmingld/kubernetes,kevin-wangzefeng/kubernetes,ravilr/kubernetes,kevin-wangzefeng/kubernetes,matthyx/kubernetes,olivierlemasle/kubernetes,spzala/kubernetes,wongma7/kubernetes,shyamjvs/kubernetes,MikeSpreitzer/kubernetes,wongma7/kubernetes,alejandroEsc/kubernetes,soltysh/kubernetes,MikeSpreitzer/kubernetes,wongma7/kubernetes,humblec/kubernetes,li-ang/kubernetes,mikebrow/kubernetes,tengqm/kubernetes,ii/kubernetes,kevin-wangzefeng/kubernetes,linux-on-ibm-z/kubernetes,gnufied/kubernetes,chestack/kubernetes,olivierlemasle/kubernetes,ping035627/kubernetes,thockin/kubernetes,verb/kubernetes,ii/kubernetes,csrwng/kubernetes,feiskyer/kubernetes,linux-on-ibm-z/kubernetes,enj/kubernetes,mengqiy/kubernetes,jessfraz/kubernetes,tengqm/kubernetes,gnufied/kubernetes,feiskyer/kubernetes,warmchang/kubernetes,mkumatag/kubernetes,GulajavaMinistudio/kubernetes,ravilr/kubernetes,thockin/kubernetes,humblec/kubernetes,GulajavaMinistudio/kubernetes,zhouhaibing089/kubernetes,zhouhaibing089/kubernetes,mosoft521/kubernetes,verb/kubernetes,sdminonne/kubernetes,GulajavaMinistudio/kubernetes,aledbf/kubernetes,cblecker/kubernetes,BenTheElder/kubernetes,deads2k/kubernetes,verb/kubernetes,MikeSpreitzer/kubernetes,soltysh/kubernetes,thockin/kubernetes,iameli/kubernetes,mahak/kubernetes,wongma7/kubernetes,MikeSpreitzer/kubernetes,gnufied/kubernetes,rnaveiras/kubernetes,roberthbailey/kubernetes,aledbf/kubernetes,shyamjvs/kubernetes,mkumatag/kubernetes,tengqm/kubernetes,chestack/kubernetes,jessfraz/kubernetes,iameli/kubernetes,ping035627/kubernetes,nikhita/kubernetes,GulajavaMinistudio/kubernetes,warmchang/kubernetes,PiotrProkop/kubernetes,aledbf/kubernetes,mahak/kubernetes,sdminonne/kubernetes,chestack/kubernetes,rnaveiras/kubernetes,k82cn/kubernetes,mikedanese/kubernetes,mikebrow/kubernetes,thockin/kubernetes,jsafrane/kubernetes,shyamjvs/kubernetes,nikhita/kubernetes,nikhita/kubernetes,warmchang/kubernetes,k82cn/kubernetes,dixudx/kubernetes,bparees/kubernetes,rrati/kubernetes,mahak/kubernetes,lojies/kubernetes,carlory/kubernetes,mahak/kubernetes,chestack/kubernetes,rrati/kubernetes,tengqm/kubernetes,jsafrane/kubernetes,liggitt/kubernetes,matthyx/kubernetes,kevin-wangzefeng/kubernetes,jessfraz/kubernetes,feiskyer/kubernetes,sdminonne/kubernetes,chestack/kubernetes,ii/kubernetes,wongma7/kubernetes,liggitt/kubernetes,GulajavaMinistudio/kubernetes,carlory/kubernetes,BenTheElder/kubernetes,warmchang/kubernetes,iameli/kubernetes,deads2k/kubernetes,mikebrow/kubernetes,dims/kubernetes,openshift/kubernetes,roberthbailey/kubernetes,gnufied/kubernetes,enj/kubernetes,dixudx/kubernetes,gnufied/kubernetes,mikedanese/kubernetes,fabriziopandini/kubernetes,spzala/kubernetes,dims/kubernetes,mikebrow/kubernetes,k82cn/kubernetes,liggitt/kubernetes,zhangmingld/kubernetes,deads2k/kubernetes,kevin-wangzefeng/kubernetes,li-ang/kubernetes,aledbf/kubernetes,jackfrancis/kubernetes,kubernetes/kubernetes,humblec/kubernetes,dixudx/kubernetes,dims/kubernetes,olivierlemasle/kubernetes,lojies/kubernetes,BenTheElder/kubernetes,roberthbailey/kubernetes,mengqiy/kubernetes,sdminonne/kubernetes,jsafrane/kubernetes,zhangmingld/kubernetes,rrati/kubernetes,linux-on-ibm-z/kubernetes,feiskyer/kubernetes,BenTheElder/kubernetes,mosoft521/kubernetes,jingxu97/kubernetes,matthyx/kubernetes,csrwng/kubernetes,dixudx/kubernetes,k82cn/kubernetes,enj/kubernetes,verb/kubernetes,feiskyer/kubernetes,tengqm/kubernetes,shyamjvs/kubernetes,soltysh/kubernetes,linux-on-ibm-z/kubernetes,mkumatag/kubernetes,dims/kubernetes,soltysh/kubernetes,roberthbailey/kubernetes,mikebrow/kubernetes,fabriziopandini/kubernetes,ravilr/kubernetes,PiotrProkop/kubernetes,zhouhaibing089/kubernetes,bparees/kubernetes,enj/kubernetes,liggitt/kubernetes,mengqiy/kubernetes,ravilr/kubernetes,ping035627/kubernetes,kubernetes/kubernetes,openshift/kubernetes,cblecker/kubernetes,mengqiy/kubernetes,mosoft521/kubernetes,verb/kubernetes,rnaveiras/kubernetes,dixudx/kubernetes,ii/kubernetes,jackfrancis/kubernetes,kubernetes/kubernetes,jingxu97/kubernetes,li-ang/kubernetes,ravilr/kubernetes,mosoft521/kubernetes,ping035627/kubernetes,rrati/kubernetes,jsafrane/kubernetes,MikeSpreitzer/kubernetes,matthyx/kubernetes,zhangmingld/kubernetes,warmchang/kubernetes,linux-on-ibm-z/kubernetes,deads2k/kubernetes,jingxu97/kubernetes,bparees/kubernetes,mikedanese/kubernetes,bparees/kubernetes,zhangmingld/kubernetes,spzala/kubernetes,li-ang/kubernetes,kubernetes/kubernetes,jessfraz/kubernetes,mahak/kubernetes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