[media] stv090x: Fix some compilation warnings

A few typos at the driver are causing the following warnings:

drivers/media/dvb/frontends/stv090x.c: In function ‘stv090x_start_search’:
drivers/media/dvb/frontends/stv090x.c:1486:27: warning: comparison between ‘enum stv090x_search’ and ‘enum stv090x_delsys’
drivers/media/dvb/frontends/stv090x.c:1487:24: warning: comparison between ‘enum stv090x_search’ and ‘enum stv090x_delsys’
drivers/media/dvb/frontends/stv090x.c: In function ‘stv090x_optimize_track’:
drivers/media/dvb/frontends/stv090x.c:2943:2: warning: case value ‘4’ not in enumerated type ‘enum stv090x_delsys’

The first two are due to the lack of using the delsys types
	STV090x_DVBS1/STV090x_DSS
instead of
	STV090x_SEARCH_DVBS1/STV090x_SEARCH_DSS

The second one is due to the usage of STV090x_UNKNOWN (enum stv090x_modulation)
instead of STV090x_ERROR (enum stv090x_delsys).

Cc: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stv090x.c

@@ -1483,8 +1483,8 @@ static int stv090x_start_search(struct stv090x_state *state)
 		if (STV090x_WRITE_DEMOD(state, FFECFG, 0x41) < 0)
 			goto err;
 
-		if ((state->search_mode == STV090x_DVBS1)	||
-			(state->search_mode == STV090x_DSS)	||
+		if ((state->search_mode == STV090x_SEARCH_DVBS1)	||
+			(state->search_mode == STV090x_SEARCH_DSS)	||
 			(state->search_mode == STV090x_SEARCH_AUTO)) {
 
 			if (STV090x_WRITE_DEMOD(state, VITSCALE, 0x82) < 0)
@@ -2940,7 +2940,7 @@ static int stv090x_optimize_track(struct stv090x_state *state)
 		STV090x_WRITE_DEMOD(state, ERRCTRL1, 0x67); /* PER */
 		break;
 
-	case STV090x_UNKNOWN:
+	case STV090x_ERROR:
 	default:
 		reg = STV090x_READ_DEMOD(state, DMDCFGMD);
 		STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);