ArmPlatformPkg/ArmVExpress-CTA15-A7.fdf: Move UEFI image above the first 128MB of...

ArmPlatformPkg/ArmVExpress-CTA15-A7.fdf: Move UEFI image above the first 128MB of DRAM

Linux and its DTB required to be loaded in the first 128MB of the system memory.
Moving UEFI firmware above this limit ensures some XIP runtime code (part of the
UEFI firmware) are not overwritten when loading Linux kernel.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15168 6f19259b-4bc3-4df7-8a09-765794883524