QcomModulePkg: BootImagev3: Load Images from partitions

Consider loading the vendor-boot partition if the boot-image header
version is greater or equal to than three. In addition to that,
perform validation checks on the vendor-boot image header. This
applies to AVB=0 and AVB=2 authentication schemes.

Change-Id: Iceb3ddbd254656ff7303419f73be86358536a30e
5 files changed