docs(changelog): remove FEAT_XXXX scopes

We have one entry per CPU features but most of the time we just add
CPU feature and its not touched again, so considering to generalize
anything with FEAT_XXXX additions to use `cpufeat` as subsection scope.

Also, some time we don't add a scope for CPU feature this causes problem
while generating release notes as CPU feature additions ends up in wrong
section.

Change-Id: Ibc80f6cdab9ae10ec3af1485640f46771b382da0
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
1 file changed