test(fvp): add a test to exercise reclaiming init code feature

Owing to the reason explained in patch [1], the feature to reclaim
BL31 init code has been disabled by default for FVP platform.

This patch upgrades an existing test config to exercise this feature
and adds a new TF build config with RECLAIM_INIT_CODE enabled
explicitly.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/14438

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ieb785feaf5b90e349494109d14b4446784eebe4d
2 files changed