iio: mxs-lradc: fix merge error

Commit e7f3db14 (89bb35e2 upstream) was backported incorrectly by me, so fix it up, as the driver is now broken.

Sorry about that.
Reported-by: Kristina Martšenko <kristina.martsenko@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/adc/mxs-lradc.c

@@ -1159,7 +1159,6 @@ static irqreturn_t mxs_lradc_handle_irq(int irq, void *data)
 				LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2));
 	}
 
-	if (iio_buffer_enabled(iio))
 	if (iio_buffer_enabled(iio)) {
 		if (reg & lradc->buffer_vchans)
 			iio_trigger_poll(iio->trig, iio_get_time_ns());