disp: msm: sde: use different spin lock for frame events

Due to lock sequence inconsistency between sde_crtc->spin_lock and
sde_kms->hw_intr->irq_lock can cause deadlock, to avoid this possible
deadlock this change uses different spin lock for frame events.

Change-Id: I51b1184dfa1069c87653099b95b992b277721daf
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>