From: Arthur Borsboom <arthurborsboom@gmail.com>

drm/gma500: Cleanup of code by following i915 constant/variable names and ordering
drm/gma500: Cleanup of code by following directions from kernel documentation: Codingstyle
drm/gma500: Cleanup of code by following directions from kernel documentation: DRM
drm/gma500: Improve readability by adding inline documentation
drm/gma500: Removed centralized exiting of function (goto statement), since it was the only used in one single location with only a return statement.

CC: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

Signed-off-by: Arthur Borsboom <arthurborsboom@gmail.com>