[msm7630] Drop unified boot header
[msm7630] Drop unified boot header

Drop unified boot header as we are not expecting osbl to load boot.img
Save osbl from checking the header and attempting to load boot.img as
it also helps boot time performance.

Change-Id: I1c4138dcd5bc2b5b669aa69c82dcbf9290ec4d5b

mozilla-b2g/fairphone2_kernel_lk,CanarySolutions/little-kernel,xndcn/moboot-for-veer,RonGokhale/android_lk_bootloader,utilite2/lk,xndcn/moboot-for-veer,idor/dk50-bootable_bootloader_lk,xndcn/moboot-for-veer,Redmi-dev/android_bootable_lk,hanjae/lumiab0,chirayudesai/android_bootable_bootloader_lk,hanjae/lumiab0,M1cha/android_bootable_bootloader_lk,beidl/lk_umia,my4ndr0id/android_bootable_bootloader_lk,jcsullins/moboot,M1cha/android_bootable_bootloader_lk,mozilla-b2g/kernel_lk,M1cha/mi2_lk,lg-devs/g2-bootloader,jbott/lk_gee,xndcn/moboot-for-veer,RonGokhale/android_lk_bootloader,zhuotong/mi2_lk_NoEmmc,CanarySolutions/little-kernel,pichina/lk,MiCode/mi2_lk,beidl/lk_umia,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,RonGokhale/android_lk_bootloader,pichina/lk,M1cha/mi2_lk,idor/dk50-bootable_bootloader_lk,my4ndr0id/android_bootable_bootloader_lk,M1cha/mi2_lk,jsr-d10/android_bootable_bootloader_lk,MiCode/mi2_lk,chirayudesai/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,M1cha/mi2_lk,oubeichen/lk-v500,detule/lk-g2-spr,t2m-foxfone/kernel_lk,xndcn/moboot-for-veer,lg-devs/g2-bootloader,Foxda-Tech/argo8-bootable-bootloader-lk,beidl/lk_umia,mozilla-b2g/fairphone2_kernel_lk,idor/dk50-bootable_bootloader_lk,CanarySolutions/little-kernel,jsr-d10/android_bootable_bootloader_lk,efidroid/lk,oubeichen/lk-v500,M1cha/lktris,efidroid/lk,t2m-foxfone/android_kernel_lk,DooMLoRD/android_bootable_bootloader_lk,utilite2/lk,t2m-foxfone/kernel_lk,mozilla-b2g/fairphone2_kernel_lk,t2m-foxfone/kernel_lk,zhuotong/mi2_lk_NoEmmc,jcsullins/moboot,CanarySolutions/little-kernel,M1cha/android_bootable_bootloader_lk,beidl/lk_umia,jbott/lk_gee,oubeichen/lk-v500,oubeichen/lk-v500,jcsullins/moboot,efidroid/lk,my4ndr0id/android_bootable_bootloader_lk,t2m-foxfone/android_kernel_lk,pichina/lk,Foxda-Tech/argo8-bootable-bootloader-lk,M1cha/lktris,RonGokhale/android_lk_bootloader,idor/dk50-bootable_bootloader_lk,jsr-d9/android_kernel_lk,MiCode/mi2_lk,zhuotong/mi2_lk_NoEmmc,Blefish/android_bootable_bootloader_lk,t2m-foxfone/kernel_lk,lg-devs/g2-bootloader,M1cha/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,pichina/lk,thornbirdblue/codeaurora_lk,utilite2/lk,mozilla-b2g/kernel_lk,jcsullins/moboot,jcsullins/moboot,utilite2/lk,mozilla-b2g/kernel_lk,Blefish/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,mozilla-b2g/kernel_lk,Blefish/android_bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,jsr-d10/android_bootable_bootloader_lk,M1cha/mi2_lk,chirayudesai/android_bootable_bootloader_lk,thornbirdblue/codeaurora_lk,my4ndr0id/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,jbott/lk_gee,jbott/lk_gee,mozilla-b2g/kernel_lk,Foxda-Tech/polaris-bootable-bootloader-lk,utilite2/lk,beidl/lk_umia,t2m-foxfone/kernel_lk,RonGokhale/android_lk_bootloader,detule/lk-g2-spr,idor/dk50-bootable_bootloader_lk,thornbirdblue/codeaurora_lk,M1cha/android_bootable_bootloader_lk,efidroid/lk,MiCode/mi2_lk,jbott/lk_gee,zhuotong/mi2_lk_NoEmmc,pichina/lk,M1cha/lktris,jcsullins/moboot,Blefish/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,mozilla-b2g/fairphone2_kernel_lk,Redmi-dev/android_bootable_lk,my4ndr0id/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,Redmi-dev/android_bootable_lk,chirayudesai/android_bootable_bootloader_lk,lg-devs/g2-bootloader,DooMLoRD/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,chirayudesai/android_bootable_bootloader_lk,oubeichen/lk-v500,hanjae/lumiab0,Foxda-Tech/polaris-bootable-bootloader-lk,DooMLoRD/android_bootable_bootloader_lk,MiCode/mi2_lk,M1cha/lktris,detule/lk-g2-spr,t2m-foxfone/android_kernel_lk,detule/lk-g2-spr,Blefish/android_bootable_bootloader_lk,DooMLoRD/android_bootable_bootloader_lk,CanarySolutions/little-kernel,lg-devs/g2-bootloader,M1cha/lktris,DooMLoRD/android_bootable_bootloader_lk,hanjae/lumiab0,zhuotong/mi2_lk_NoEmmc,hanjae/lumiab0,t2m-foxfone/android_kernel_lk,t2m-foxfone/android_kernel_lk,thornbirdblue/codeaurora_lk,detule/lk-g2-spr,efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,thornbirdblue/codeaurora_lk,mozilla-b2g/fairphone2_kernel_lk,jsr-d9/android_kernel_lk,jsr-d10/android_bootable_bootloader_lk