dev: gcdb: display: add support to swap DSI lanes to drive a panel

On CDP devices, some panels have the support for an adapter/interposer
card to swap the DSI controller/PHY that drive the panel. This is to
faciliate the usage of a different panel as secondary for dual DSI
use-cases. Add support to specify this using fastboot oem command.

Example:
fastboot oem command for default truly 1080p panel (driven by DSI-0):
fastboot oem select-display-panel truly_1080p_video

fastboot oem command when interposer card is used (driven by DSI-1):
fastboot oem select-display-panel truly_1080p_video:swap

Change-Id: Ia7871200949d2abc8a5d2d8e55ec9315fe5aa37e
3 files changed