iio: adc: ad7793: removed unnecessary else.

Else is not generally useful after a break or return.
Signed-off-by: NNizam Haider <nijamh@cdac.in>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/adc/ad7793.c

@@ -478,10 +478,9 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
 				*val2 = st->
 					scale_avail[(st->conf >> 8) & 0x7][1];
 				return IIO_VAL_INT_PLUS_NANO;
-			} else {
+			}
 			/* 1170mV / 2^23 * 6 */
 			scale_uv = (1170ULL * 1000000000ULL * 6ULL);
-			}
 			break;
 		case IIO_TEMP:
 				/* 1170mV / 0.81 mV/C / 2^23 */