drm/i915: Fix the incorrect argument for SDVO SET_TV_format command

Otherwise it will cause that S-video output becomes black/white when
switching to other TV format.

http://bugs.freedesktop.org/show_bug.cgi?id=23916Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Tested-by: Arnold <arnold.erbsloeh@web.de>
Tested-by: Bazin <bazin.cz@gmail.com>
Tested-by: Nigel <nigel_tuck@eircom.net>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/intel_sdvo.c

@@ -1032,7 +1032,7 @@ static void intel_sdvo_set_tv_format(struct intel_encoder *intel_encoder)
 	memcpy(&format, &format_map, sizeof(format_map) > sizeof(format) ?
 			sizeof(format) : sizeof(format_map));
 
-	intel_sdvo_write_cmd(intel_encoder, SDVO_CMD_SET_TV_FORMAT, &format_map,
+	intel_sdvo_write_cmd(intel_encoder, SDVO_CMD_SET_TV_FORMAT, &format,
 			     sizeof(format));
 
 	status = intel_sdvo_read_response(intel_encoder, NULL, 0);