soc/amd/common: Fix most checkpatch errors

Correct the majority of reported errors and mark most of the
remaining ones as todo.  Some of the lines requiring a >80
break are indented too much currently.

Changes to agesawrapper.c cause the build to change, so this
file is also left as-is.  Make hex values consistently lower-case.

BUG=chrome-os-partner:622407746

Change-Id: I0464f0cafac4ee67edc95d377dcf7aab9a90c66b
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/20249
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
10 files changed