staging: iio: cdc: Don't put an else right after a return

This fixes the following checkpatch.pl warning:
WARNING: else is not generally useful after a break or return.

While at it, remove new line for symmetry with the rest of the code.
Signed-off-by: Catalina Mocanu <catalina.mocanu@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/cdc/ad7150.c

@@ -143,18 +143,14 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
 	case IIO_EV_TYPE_MAG_ADAPTIVE:
 		if (dir == IIO_EV_DIR_RISING)
 			return adaptive && (threshtype == 0x1);
-		else
 		return adaptive && (threshtype == 0x0);
 	case IIO_EV_TYPE_THRESH_ADAPTIVE:
 		if (dir == IIO_EV_DIR_RISING)
 			return adaptive && (threshtype == 0x3);
-		else
 		return adaptive && (threshtype == 0x2);
-
 	case IIO_EV_TYPE_THRESH:
 		if (dir == IIO_EV_DIR_RISING)
 			return !adaptive && (threshtype == 0x1);
-		else
 		return !adaptive && (threshtype == 0x0);
 	default:
 		break;