refactor(cpufeat): add macro to simplify is_feat_xx_present

In this patch, we are trying to introduce the wrapper macro
CREATE_FEATURE_PRESENT to get the following capability and
align it for all the features:

-> is_feat_xx_present(): Does Hardware implement the feature.
-> uniformity in naming the function across multiple features.
-> improved readability

The is_feat_xx_present() is implemented to check if the hardware
implements the feature and does not take into account the
ENABLE_FEAT_XXX flag enabled/disabled in software.

- CREATE_FEATURE_PRESENT(name, idreg, shift, mask, idval)
The wrapper macro reduces the function to a single line and
creates the is_feat_xx_present function that checks the
id register based on the shift and mask values and compares
this against a determined idvalue.

Change-Id: I7b91d2c9c6fbe55f94c693aa1b2c50be54fb9ecc
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/services/std_svc/rmmd/rmmd_main.c b/services/std_svc/rmmd/rmmd_main.c
index 033e868..6ccb003 100644
--- a/services/std_svc/rmmd/rmmd_main.c
+++ b/services/std_svc/rmmd/rmmd_main.c
@@ -202,7 +202,7 @@
 	int rc;
 
 	/* Make sure RME is supported. */
-	assert(get_armv9_2_feat_rme_support() != 0U);
+	assert(is_feat_rme_present());
 
 	rmm_ep_info = bl31_plat_get_next_image_ep_info(REALM);
 	if (rmm_ep_info == NULL) {