msm: sde: Correct resource release upon rotator exit

This patch turns off clock and bus control as well releases other
software resources upon driver exit.  This patch
corrects crash due to resource leakage.

CRs-Fixed: 1018309
Change-Id: Ie0c6639fff9b829a58e12037f88c6508864b60a0
Signed-off-by: Alan Kwong <akwong@codeaurora.org>