refactor(fvp): increase bl2 size when bl31 in DRAM

Increase the space for BL2 by 0xC000 to accommodate the increase in size
of BL2 when ARM_BL31_IN_DRAM is set.

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Ifc99da51f2de3c152bbed1c8269dcc8b9100797a

plat/arm/board/fvp/include/platform_def.h

@@ -197,6 +197,9 @@
 # define PLAT_ARM_MAX_BL2_SIZE	(UL(0x1E000) - FVP_BL2_ROMLIB_OPTIMIZATION)
 #elif CRYPTO_SUPPORT
 # define PLAT_ARM_MAX_BL2_SIZE	(UL(0x1D000) - FVP_BL2_ROMLIB_OPTIMIZATION)
+#elif ARM_BL31_IN_DRAM
+/* When ARM_BL31_IN_DRAM is set, BL2 can use almost all of Trusted SRAM. */
+# define PLAT_ARM_MAX_BL2_SIZE	(UL(0x1F000) - FVP_BL2_ROMLIB_OPTIMIZATION)
 #else
 # define PLAT_ARM_MAX_BL2_SIZE	(UL(0x13000) - FVP_BL2_ROMLIB_OPTIMIZATION)
 #endif