feat(mte): add mte2 feat

Add support for feat mte2. tfsr_el2 is available only with mte2,
however currently its context_save/restore is done with mte rather than
mte2, so introduce 'is_feat_mte2_supported' to check mte2.

Change-Id: I108d9989a8f5b4d1d2f3b9865a914056fa566cf2
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/include/arch/aarch32/arch_features.h b/include/arch/aarch32/arch_features.h
index a2063f1..dd9b7ad 100644
--- a/include/arch/aarch32/arch_features.h
+++ b/include/arch/aarch32/arch_features.h
@@ -149,6 +149,7 @@
 static inline bool is_feat_rng_supported(void) { return false; }
 static inline bool is_feat_gcs_supported(void) { return false; }
 static inline bool is_feat_mte_supported(void) { return false; }
+static inline bool is_feat_mte2_supported(void) { return false; }
 static inline bool is_feat_mpam_supported(void) { return false; }
 static inline bool is_feat_hcx_supported(void) { return false; }
 static inline bool is_feat_sve_supported(void) { return false; }