Patch from Nicolas Pitre

This is the PXA2xx common IRDA driver, plus platform support
for Lubbock and Mainstone.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Acked-by: NJean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>