fix(tc): enable FEAT_MTE2

Commit c282384db ("refactor(mte): remove mte, mte_perm") removes the
option FEAT_MTE and introduces FEAT_MTE2 option. Afterwards, the
FEAT_MTE2 option is missed on the TC platform and the feature is
disabled. As a result, it causes the panic in secure world.

This patch enables the FEAT_MTE2 option for TC platform to allow the
secure world can access the MTE registers properly.

Change-Id: If697236aa59bf4fb374e0ff43b53455ac2154e9c
Fixes: c282384db ("refactor(mte): remove mte, mte_perm")
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/plat/arm/board/tc/platform.mk b/plat/arm/board/tc/platform.mk
index 8756f31..a2bc9c2 100644
--- a/plat/arm/board/tc/platform.mk
+++ b/plat/arm/board/tc/platform.mk
@@ -40,6 +40,7 @@
 
 ifeq (${SPD},spmd)
 	SPMD_SPM_AT_SEL2	:=	1
+	ENABLE_FEAT_MTE2	:=	1
 	CTX_INCLUDE_PAUTH_REGS	:=	1
 endif