UPSTREAM: dmaengine: add peripheral configuration

Some complex dmaengine controllers have capability to program the
peripheral device, so pass on the peripheral configuration as part of
dma_slave_config

Link: https://lore.kernel.org/r/20201109085450.24843-3-vkoul@kernel.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>

Bug: 159736148
(cherry picked from commit e7bbb7ac)
Change-Id: Id12675fe9b79781310d99e1aec6d323dc4f360f5
Signed-off-by: Jindong Yue <jindong.yue@nxp.com>