new video driver for bus vcxk framebuffers

This patch adds a new video driver

* adds common bus_vcxk framebuffer driver

Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
[agust@denx.de: fixed lots of style issues before applying]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index bc00852..bb6b5a0 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -36,6 +36,7 @@
 COBJS-$(CONFIG_SED156X) += sed156x.o
 COBJS-$(CONFIG_VIDEO_SM501) += sm501.o
 COBJS-$(CONFIG_VIDEO_SMI_LYNXEM) += smiLynxEM.o
+COBJS-$(CONFIG_VIDEO_VCXK) += bus_vcxk.o
 COBJS-y += videomodes.o
 
 COBJS	:= $(COBJS-y)