Add empty EXPORT_SYMBOL macro
Add empty module_param_named() and MODULE_PARM_DESC() macros
drm: Rename DRM_ARRAY_SIZE to ARRAY_SIZE to reduce diff with Linux
Use EXPORT_SYMBOL fake macro to reduce diff with Linux (incomplete task)
Replace DRM_[MU]DELAY() by [mu]delay() macros
Remove drm_internal.h, now unused
Remove drm_sman.[ch], used nowhere
drm: Update many more files to their Linux 3.8 version (WIP)

This is only compile-tested: this commit is just to "backup" this work
in progress (already a lot of changes).