Explicitly enable RECLAIM_INIT_CODE for fvp-aarch64-roxlattables build

Many test configs such as the one shown below depend on RECLAIM_INIT_CODE
to be enabled. Without it, the build would fail once the git patch[1] is
applied.

Please refer to [2] for further description of why this change is needed
now.

tf-l2-boot-tests-misc/fvp-aarch64-roxlattables,fvp-default:fvp-tftf-fip.tftf-aemv8a.roxlattables.bl31_panic-debug

[1] https://git.trustedfirmware.org/ci/tf-a-ci-scripts.git/tree/patch/readonly_xlat_tables/arm_bl31_setup_write_after_readonly.patch

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

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I29796c06b6f985394aaeb36c383a19f2c13218dd
diff --git a/tf_config/fvp-aarch64-roxlattables b/tf_config/fvp-aarch64-roxlattables
index 9377bbf..6365a46 100644
--- a/tf_config/fvp-aarch64-roxlattables
+++ b/tf_config/fvp-aarch64-roxlattables
@@ -1,3 +1,4 @@
 CROSS_COMPILE=aarch64-none-elf-
 PLAT=fvp
 ALLOW_RO_XLAT_TABLES=1
+RECLAIM_INIT_CODE=1