platform: msm_shared: read power on bit for long press
platform: msm_shared: read power on bit for long press

For long press feature power on reason is checked with key press only.
In case of pmic8950 pon bit is also set along with key press bit. Add the check
to accomodate this condition.

Change-Id: Ia63fb1a254e8c5a99d3b8b413db5fb4b5f4735c4

Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk