dmaengine: ste_dma40: Drop local dma_parms

Since commit 9495b7e9 ("driver core: platform: Initialize dma_parms
for platform devices"), struct platform_device already provides a
dma_parms structure, so we can save allocating another one.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/011a956183b92a258bf0922385d145ea966dcbea.1599164692.git.robin.murphy@arm.com


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