build(fvp): enlarge ram size to pass CI

The spm-l2-boot-tests with fvp-spm-tbb build config fails after
a code refactor patch, the BL2 image exceeds the memory region.

Enlarge the size with the parameter FVP_TRUSTED_SRAM_SIZE=384.

Change-Id: I221a4d1686280ba90b94107edf2e2fd08a46c9ea
Signed-off-by: Abhi Singh <abhi.singh@arm.com>
diff --git a/tf_config/fvp-spm-tbb b/tf_config/fvp-spm-tbb
index 741a6ab..06ca8da 100644
--- a/tf_config/fvp-spm-tbb
+++ b/tf_config/fvp-spm-tbb
@@ -13,6 +13,7 @@
 GENERATE_COT=1
 ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem
 TRUSTED_BOARD_BOOT=1
+FVP_TRUSTED_SRAM_SIZE=384
 USE_ROMLIB=1
 GIC_EXT_INTID=1
 PLAT_TEST_SPM=1