video: mb862xx: add support for controller's I2C bus adapter

Add adapter driver for I2C adapter in Coral-P(A)/Lime GDCs.
So we can easily access devices on controller's I2C bus using
i2c-dev interface.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 7326962..549b9606 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2294,6 +2294,15 @@
 
 endchoice
 
+config FB_MB862XX_I2C
+	bool "Support I2C bus on MB862XX GDC"
+	depends on FB_MB862XX && I2C
+	default y
+	help
+	  Selecting this option adds Coral-P(A)/Lime GDC I2C bus adapter
+	  driver to support accessing I2C devices on controller's I2C bus.
+	  These are usually some video decoder chips.
+
 config FB_EP93XX
 	tristate "EP93XX frame buffer support"
 	depends on FB && ARCH_EP93XX