msm_fb: hdmi: HDMI suspend resume event handling

This change makes sure that we do the proper HDMI ON settings at resume
and also send the events to user-space about current status of HPD after
resume.

CRs-Fixed: 422372
Change-Id: I8ca79fd07840b3227c9472588853b0ca2749760b
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>