serial: at91: add dma support in usart binding descriptions

Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Elen Song 2013-07-22 16:30:31 +08:00 • committed by Greg Kroah-Hartman
commit e469719344