video: Add skeleton driver for ZynqMP Display port driver

The reason for this driver is to use call power management driver to enable
it in PMUFW. There is missing functionality now but should be added in
near future.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/598cb9515bbabc803f72e287464e3d107cd106a3.1645627920.git.michal.simek@xilinx.com
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index ff8e11f..646fec7 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -680,6 +680,14 @@
 	  Enable support for the Syncoam PM-OLED display driver (RGB 160x128).
 	  Currently driver is supporting only SPI interface.
 
+config VIDEO_ZYNQMP_DPSUB
+	bool "Enable video support for ZynqMP Display Port"
+	depends on DM_VIDEO && ZYNQMP_POWER_DOMAIN
+	help
+	  Enable support for Xilinx ZynqMP Display Port. Currently this file
+	  is used as placeholder for driver. The main reason is to record
+	  compatible string and calling power domain driver.
+
 source "drivers/video/nexell/Kconfig"
 
 config VIDEO