drm: remove is_pci flag completely...

this snuck back in, in the last merge.
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/radeon_drv.h

@@ -273,7 +273,6 @@ typedef struct drm_radeon_private {
 
 	/* starting from here on, data is preserved accross an open */
 	uint32_t flags;		/* see radeon_chip_flags */
-	int is_pci;
 } drm_radeon_private_t;
 
 typedef struct drm_radeon_buf_priv {