drm/msm/sde: move smmu_state handling from CRTC to KMS

Handle all the smmu_state related programming in sde_kms
as these operations impacts all the CRTCs. This would
the decision making simpler for many secure usecases.

Change-Id: I86bdd70fe7ac955ed2589dd7c968e4788f7cf8c6
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>