drm/radeon/kms: don't fail if we fail to init GPU acceleration

Userspace can query if acceleration is working or not true get
info ioctl and could fallback to software if for some reason
kernel failed to initialize KMS. This should allow to give a
working KMS setup in all case (even with non functionning accel).

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index 2ba61e1..b67bbd7 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -899,6 +899,7 @@
 #define RADEON_INFO_DEVICE_ID		0x00
 #define RADEON_INFO_NUM_GB_PIPES	0x01
 #define RADEON_INFO_NUM_Z_PIPES 	0x02
+#define RADEON_INFO_ACCEL_WORKING	0x03
 
 struct drm_radeon_info {
 	uint32_t		request;