dev: gcdb: display: add platform specific offsets to DSI base
dev: gcdb: display: add platform specific offsets to DSI base

Derived platforms may have different base addresses than the base
platform. In such cases, the base addresses need to adjusted
accordingly. Add the differential offset compared to base platform.

Change-Id: I4c246457ddf0188e361820f09ee6d2c9bff944da

CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,efidroid/lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,efidroid/lk,efidroid/lk,efidroid/lk,CanarySolutions/little-kernel,efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,CanarySolutions/little-kernel