drm/radeon/kms: add initial radeon tv-out support.

This ports the tv-out code from the DDX to KMS.

adds a radeon.tv module option, radeon.tv=0 to disable tv

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 0bd5879..133e975 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -91,6 +91,7 @@
 int radeon_benchmarking = 0;
 int radeon_testing = 0;
 int radeon_connector_table = 0;
+int radeon_tv = 1;
 #endif
 
 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
@@ -123,6 +124,9 @@
 
 MODULE_PARM_DESC(connector_table, "Force connector table");
 module_param_named(connector_table, radeon_connector_table, int, 0444);
+
+MODULE_PARM_DESC(tv, "TV enable (0 = disable)");
+module_param_named(tv, radeon_tv, int, 0444);
 #endif
 
 static int radeon_suspend(struct drm_device *dev, pm_message_t state)