dev: gcdb: adding none to dsi1 string for single dsi cases
dev: gcdb: adding none to dsi1 string for single dsi cases

Trying to boot up a dual dsi panel as single dsi through fastboot
oem command results in the kernel taking pref-panel for dsi1. To
avoid this case, none is passed as the dsi1 string and is handled
appropriately in the kernel.
* Reboot the device into fastboot mode
* Run the following command:
  fastboot oem select-display-panel
  <sim_cmd_panel/sim_cmd_panel>
* Reboot into apps bootloader
  fastboot reboot-bootloader

Change-Id: I683413ed1d5045a71d960dd6028f891b51a1a391

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