[media] drx-j: drxj_default_aud_data_g can be static

Fix sparse warning:
	drivers/media/dvb-frontends/drx39xyj/drxj.c:1039:16: sparse: symbol 'drxj_default_aud_data_g' was not declared. Should it be static?
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/dvb-frontends/drx39xyj/drxj.c

@@ -902,7 +902,7 @@ struct drx_demod_instance drxj_default_demod_g = {
 * This structure is DRXK specific.
 *
 */
-struct drx_aud_data drxj_default_aud_data_g = {
+static struct drx_aud_data drxj_default_aud_data_g = {
 	false,			/* audio_is_active */
 	DRX_AUD_STANDARD_AUTO,	/* audio_standard  */