drm: Add via unichrome support

Add DRM device driver for VIA Unichrome chipsets

From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom    Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/Kconfig b/drivers/char/drm/Kconfig
index c2b12ea..123417e 100644
--- a/drivers/char/drm/Kconfig
+++ b/drivers/char/drm/Kconfig
@@ -96,3 +96,10 @@
           chipset. If M is selected the module will be called sis. AGP
           support is required for this driver to work.
 
+config DRM_VIA
+	tristate "Via unichrome video cards"
+	depends on DRM
+	help
+	  Choose this option if you have a Via unichrome or compatible video
+	  chipset. If M is selected the module will be called via.
+