msm: sde: update dmabuf cache maintenance control

For all uncached dma buffer type, we should setup for no cache
maintenance when calling dma_buf_map_attachment. The assumption here is
that all uncached dma buffer are for device to device sharing, and no
cpu access is required.

Change-Id: Ibfff618862f8831f728f610df19ae4aefce70341
Signed-off-by: Benjamin Chan <bkchan@codeaurora.org>