drm: add initial r500 drm support

This adds CP support for the r500 series of chips, and allows
accel 2D support on these chips with a new radeon driver.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/char/drm/radeon_drm.h b/drivers/char/drm/radeon_drm.h
index 5f8d042..71e5b21 100644
--- a/drivers/char/drm/radeon_drm.h
+++ b/drivers/char/drm/radeon_drm.h
@@ -656,6 +656,7 @@
 #define RADEON_PARAM_SCRATCH_OFFSET        11
 #define RADEON_PARAM_CARD_TYPE             12
 #define RADEON_PARAM_VBLANK_CRTC           13   /* VBLANK CRTC */
+#define RADEON_PARAM_FB_LOCATION           14   /* FB location */
 
 typedef struct drm_radeon_getparam {
 	int param;