drm/msm/sde: cleanup all the pipes in one-shot during msm_preclose

When drm_fb_release is executed on a file, it iterates over
all the framebuffers and disables the pipes associated with
the fb one-by-one and issues an atomic_commit. This might
cause validation failures in the atomic_check due to hw pipe
interdependencies. To avoid such a case, override the
pre_close function to disable all the pipes associated with
all the fbs in the file and issue one single atomic_commit.

Change-Id: Ida9607317594a42f49b1e1bd30fb3d592bd79ab2
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>