msm: mdss: fix IOMMU fault in smart blit

Fix IOMMU falut in BG layer access when updown flip is enabled on
FG layer in smart blit. Adjust BG address using mdp_bg_adjust_rot_addr
function.

Change-Id: Ifbfdf1b10a7896a1e397d7f84b055b3719d4982c
Signed-off-by: Ramakant Singh <ramaka@codeaurora.org>