media: dvb-core/dvb_frontend: set better default for ISDB-T

DTV_ISDBT_LAYER_ENABLED parameter should be set to "All" by default,
instead of "None", as described in the API document.

Signed-off-by: Akihiro Tsukada <tskd08@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/dvb-core/dvb_frontend.c

@@ -980,7 +980,7 @@ static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 	c->isdbt_sb_subchannel = 0;
 	c->isdbt_sb_segment_idx = 0;
 	c->isdbt_sb_segment_count = 0;
-	c->isdbt_layer_enabled = 0;
+	c->isdbt_layer_enabled = 7;	/* All layers (A,B,C) */
 	for (i = 0; i < 3; i++) {
 		c->layer[i].fec = FEC_AUTO;
 		c->layer[i].modulation = QAM_AUTO;