fix(sme): disable SME for SPD=spmd

SPMD is not compatible with ENABLE_SME_FOR_NS.
Hence disable SME when SPD=spmd

Change-Id: I8bcf2493819718732563f9db69f7186ac7437637
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 214064b..09878cc 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -50,7 +50,8 @@
 	ENABLE_FEAT_RNG			:= 2
 	ENABLE_FEAT_TWED		:= 2
 	ENABLE_FEAT_GCS			:= 2
-ifeq (${ARCH},aarch64)
+ifeq (${ARCH}, aarch64)
+ifneq (${SPD}, spmd)
 ifeq (${SPM_MM}, 0)
 ifeq (${ENABLE_RME}, 0)
 ifeq (${CTX_INCLUDE_FPREGS}, 0)
@@ -60,6 +61,7 @@
 endif
 endif
 endif
+endif
 
 # enable unconditionally for all builds
 ifeq (${ARCH}, aarch64)