Build: Clean up redundant config groups

Many config groups are out of date and are not in use any more.
Deprecated config groups are removed in this patch.
This patch also merges groups that contain totally same configs,
so that the code will be much more easier to maintain.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I21dbbb03be6586f9cbad6fa833e72f8155b73775
2 files changed