OMAP: Add support for VRFB rotation engine

VRFB rotation engine is a block in OMAP2/3 that offers 12 independent
contexts that can be used for framebuffer rotation.

Each context has a backend area of real memory, where it stores the
pixels in undisclosed format. This memory is offered to users via 4
virtual memory areas, which see the same memory area in different
rotation angles (0, 90, 180 and 270 degrees).

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/Makefile b/drivers/video/omap2/Makefile
index 7fdf7bd..aa3751b 100644
--- a/drivers/video/omap2/Makefile
+++ b/drivers/video/omap2/Makefile
@@ -1 +1,2 @@
 obj-$(CONFIG_OMAP2_VRAM) += vram.o
+obj-$(CONFIG_OMAP2_VRFB) += vrfb.o