ANDROID: dma: Select CONFIG_DMA_ENGINE_RAID in Kconfig.gki

select hidden Kconfig: DMA_ENGINE_RAID.

some dma devices selects DMA_ENGINE_RAID. this changes variable's type in
struct dmaengine_unmap_data.
it is required by dma device drivers to provide unified interface as modules.

Bug: 396582183

Change-Id: I85a819ae2da820c949fc0dd5667a31fa44d07e13
Signed-off-by: Bumyong Lee <bumyong.lee@samsung.com>
(cherry picked from commit 89542310)