disp: msm: move thread priority call from component bind

Move thread priority call to kernel worker thread because
component bind API may run from vendor_modeprobe process
context when all drivers probe succeed. Thread priority
update is not allowed from vendor_modeprobe process
context.

Change-Id: Iafac97ce02942d6a2134495232f3c395ba4a362f
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/msm_drv.h

@@ -976,6 +976,8 @@ struct msm_drm_private {
 	struct task_struct *pp_event_thread;
 	struct kthread_worker pp_event_worker;
 
+	struct kthread_work thread_priority_work;
+
 	unsigned int num_encoders;
 	struct drm_encoder *encoders[MAX_ENCODERS];