feat(tc): enable SME and SME2 options for TC4

Set the Make flags for TF-A to be able to enable SME and SME2 features.
Note that we enable these architectural features for both the secure and
non-secure worlds, which is required on TC4.

In the case of the non-secure world, we specify a value of 2 for the
flag which specifies that TF-A should check the feature register to
ensure that the feature is present before enabling it. This allows these
flags to be compatible with all platforms and stops TF-A doing anything
different if it does not detect that the feature is present.

Change-Id: I51f8c7e3eb1cf06767f4b155c93269e1f129f730
Signed-off-by: Jackson Cooper-Driver <jackson.cooper-driver@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>

plat/arm/board/tc/platform.mk

@@ -26,6 +26,9 @@ BRANCH_PROTECTION		:=	1
 ENABLE_FEAT_MPAM		:=	1 # default is 2, optimise
 ENABLE_SVE_FOR_NS		:=	2 # to show we use it
 ENABLE_SVE_FOR_SWD		:=	1
+ENABLE_SME_FOR_NS		:=	2
+ENABLE_SME2_FOR_NS		:=	2
+ENABLE_SME_FOR_SWD		:=	1
 ENABLE_TRBE_FOR_NS		:=	1
 ENABLE_SYS_REG_TRACE_FOR_NS	:=	1
 ENABLE_FEAT_AMU			:=	1