[media] Add the via framebuffer camera controller driver

Add a driver for the video capture port on VIA integrated chipsets.  This
version has a remaining OLPCism or two and expects to be talking to an
ov7670; those can be improved as the need arises.

This work was supported by the One Laptop Per Child project.
Thanks to Laurent Pinchart for a number of useful comments.

Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 2d42267..0efbb29 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -712,6 +712,16 @@
 	---help---
 	  This driver supports SR030PC30 VGA camera from Siliconfile
 
+config VIDEO_VIA_CAMERA
+	tristate "VIAFB camera controller support"
+	depends on FB_VIA
+	select VIDEOBUF_DMA_SG
+	select VIDEO_OV7670
+	help
+	   Driver support for the integrated camera controller in VIA
+	   Chrome9 chipsets.  Currently only tested on OLPC xo-1.5 systems
+	   with ov7670 sensors.
+
 config SOC_CAMERA
 	tristate "SoC camera support"
 	depends on VIDEO_V4L2 && HAS_DMA && I2C