[PATCH] ARM: OMAP: Watchdog

Teach the OMAP watchdog driver about the driver model, including
defining a shutdown method (to stop the timer before kexec etc)
and suspend/resume methods (for system sleep states).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>