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