V4L/DVB (3382): Fix stv0297 for qam128 on tt c1500 (saa7146)

I have a TT C1500 card (saa7146, STV0297) which had problems tuning
channels at QAM128 (like the ones in the Finnish HTV / Welho network).
A fix which seems to work perfectly so far is to change the delay for
QAM128 to the same values as for QAM256 in stv0297_set_frontend(),

Signed-off-by: Mattias Nordstrom <[e-mail]>
Signed-off-by: Michael Krufky <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/stv0297.c

···
 		break;
 
 	case QAM_128:
-		delay = 150;
-		sweeprate = 1000;
-		break;
-
 	case QAM_256:
 		delay = 200;
 		sweeprate = 500;