fix: bl2 start address for RESET_TO_BL2+ENABLE_PIE

BL31 image has grown with feature addition over time. In particular the
RESET_TO_BL2 + ENABLE_PIE + DEBUG combination of options lead to BL31
image overlap head of BL2 image. In this configuration BL2 is meant to
stay resident as PE reset occurs from BL2. Apply changes similar to [1]
such that BL2 start address is pushed forward and leaves more room for
BL31 end of image.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/15486/9/include/plat/arm/common/arm_def.h#530

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I027e23780fb77ca9fe81aa47231da649c7a030ee
1 file changed