msm: vidc: Fix Power Collapse issue

Driver is not polling for the PC Ready to be
set and truning of the regulators/clocks. Fix the
same.
H2X Interrupt has to be enabled for every boot.

CRs-Fixed: 2572953
Change-Id: Ib24b35dcebedf464bcd461718a18e732531ea4ce
Signed-off-by: Manikanta Kanamarlapudi <kmanikan@codeaurora.org>