Patch to not set reserved bits in i.MX25 PROCTL register.  DMA stops
working if those bits get set.
Signed-off-by: NWilson Callan <wilson.callan@savantsystems.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NChris Ball <cjb@laptop.org>