platform: 8916: Update iomap header with MDSS offsets
platform: 8916: Update iomap header with MDSS offsets

Add the register offsets related to MDP and DSI registers
in the iomap header file for 8916.

Change-Id: If5f3b371ed614c59a9f074e527a8a1c265574dc0

Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,CanarySolutions/little-kernel,efidroid/lk,efidroid/lk,M1cha/lktris,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,M1cha/lktris,CanarySolutions/little-kernel,M1cha/android_bootable_bootloader_lk,M1cha/lktris,efidroid/lk,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,M1cha/lktris,efidroid/lk,M1cha/android_bootable_bootloader_lk,efidroid/lk,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,M1cha/lktris,Foxda-Tech/polaris-bootable-bootloader-lk