tc2: add mte2 for tc2 builds

The kernel image used to boot tc2 in CI expects MTE2 to be enabled.
In TF-A SCR-EL3.ATA bit(26) was set without any dependency,
However with patch:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/26891

SCR-EL3.ATA depends on FEAT_MTE2, since we are using a kernel image
which expects the SCR-EL3.ATA to be set, we need to enable FEAT_MTE2
for kernel boot tests with tc2.

Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
Change-Id: I1ff4b68f90b5e03c1cbfa75af56dc5260de90ac2
diff --git a/tf_config/fvp-tc2-tbb b/tf_config/fvp-tc2-tbb
index 0aec3e9..51d2d66 100644
--- a/tf_config/fvp-tc2-tbb
+++ b/tf_config/fvp-tc2-tbb
@@ -11,3 +11,4 @@
 SCP_BL2=/dev/null
 TARGET_PLATFORM=2
 TRUSTED_BOARD_BOOT=1
+ENABLE_FEAT_MTE2=1
diff --git a/tf_config/fvp-tc2-tbb-dpe b/tf_config/fvp-tc2-tbb-dpe
index 83acc73..3396b0d 100644
--- a/tf_config/fvp-tc2-tbb-dpe
+++ b/tf_config/fvp-tc2-tbb-dpe
@@ -13,3 +13,4 @@
 SCP_BL2=/dev/null
 TARGET_PLATFORM=2
 TRUSTED_BOARD_BOOT=1
+ENABLE_FEAT_MTE2=1