mdss: mdp: start vreg release index from PANEL_PM

Start vreg release index from PANEL_PM to avoid
release call with DSI_MAX_PM in error case. This
avoids crash in dsi_probe if panel node parsing fails.

Change-Id: I236f40851d41831fe37eea77aa83e2f4ce031a3b
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
msm: mdss: reset runtime status upon device resume

MDSS is power-collapsed in idle screen cases using the pm runtime
framework. However, it is possible that the runtime PM status may
not match with the post-system sleep status when the device is
resumed. This sometimes leads to the inconsistencies in MDSS
idle-power collapse upon system resume. To address this issue,
reset the runtime PM status in the pm resume handler.

Change-Id: I74b082d2ff80c3719996a482510ba24e1f5f8170
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>