drm/radeon/kms: clean HDMI definitions

We already know same offsets are used for different encoders/transmitters, so
just numeric them instead naming incorrectly. Additionaly we found additional
registers needed for RV770+

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index b868ffa..55a4175 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -345,6 +345,7 @@
 	struct drm_display_mode native_mode;
 	void *enc_priv;
 	int hdmi_offset;
+	int hdmi_config_offset;
 	int hdmi_audio_workaround;
 	int hdmi_buffer_status;
 };