[media] zl10353: change .read_snr() to report SNR as a 0.1 dB

Report SNR in 0.1 dB scale instead of raw hardware register values.

Signed-off-by: Antti Palosaari <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/zl10353.c

···
 		zl10353_dump_regs(fe);
 
 	_snr = zl10353_read_register(state, SNR);
-	*snr = (_snr << 8) | _snr;
+	*snr = 10 * _snr / 8;
 
 	return 0;
 }