Staging: iio: adc: Add missing blank line

This fixes following checkpatch.pl warningi:

WARNING: Missing a blank line after declarations
Signed-off-by: NVaishali Thakkar <vthakkar1994@gmail.com>
Acked-by: NDaniel Baluta <daniel.baluta@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -1420,6 +1420,7 @@ static int mxs_lradc_hw_init(struct mxs_lradc *lradc)
 		(LRADC_DELAY_TIMER_PER << LRADC_DELAY_DELAY_OFFSET);
 
 	int ret = stmp_reset_block(lradc->base);
+
 	if (ret)
 		return ret;