Before it isn't too late let's switch to IO memory accessors.
This patch converts all current _REG users and _REG definitions.
There should be no functional changes.
Suggested-by: NBen Dooks <ben-linux@fluff.org>
Suggested-by: NSergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: NAnton Vorontsov <avorontsov@mvista.com>