Add kernel-doc documentation for the EP93xx DMA memory to
peripheral/peripheral to memory API.
Signed-off-by: NRyan Mallon <ryan@bluewatersys.com>
Acked-by: NMika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>