app: aboot: check for address overlap for the tags_addr
app: aboot: check for address overlap for the tags_addr

Validate the tags_addr to check if it overlaps with ABOOT
in case of DTB appened in the kernel image.

Conflicts:
	app/aboot/aboot.c

CRs-Fixed: 674071
Change-Id: I7535e75987a1963c3b55cb9a8f8988fb8354b09b

Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk