dtc: Accept NOPs in dtb input regardless of version
dtc: Accept NOPs in dtb input regardless of version

Since Milton's patch, dtc will accept (and, correctly, ignore) NOP
tags when given dtb input v16 or later.  However, although NOPs
weren't defined in earlier versions, they're not ambiguous, so should
be accepted there as well.  This patch does so, printing a mere
warning when finding NOPs in a too-early dtb version.

Signed-off-by: David Gibson <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@gibson.dropbear.id.au>

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