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>
15 files changed