platform: msm_shared: Support for panel signature read API
platform: msm_shared: Support for panel signature read API

Since panel id read function is common accross all the platforms
add this API to msm_shared so that it is shared by all targets.

Change-Id: I7ac0e7cad94b42a647c8cb3803e5d535ef99baa3

Redmi-dev/android_bootable_lk,t2m-foxfone/kernel_lk,Redmi-dev/android_bootable_lk,t2m-foxfone/kernel_lk,mozilla-b2g/kernel_lk,Redmi-dev/android_bootable_lk,Redmi-dev/android_bootable_lk,mozilla-b2g/kernel_lk,mozilla-b2g/kernel_lk,t2m-foxfone/kernel_lk,mozilla-b2g/kernel_lk,Redmi-dev/android_bootable_lk,mozilla-b2g/kernel_lk,t2m-foxfone/kernel_lk,t2m-foxfone/kernel_lk