iio: adc: mcp3911: fix indentation

The whole file does not make use of indentation properly.
Do something about it.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20230822192259.1125792-5-marcus.folkesson@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/mcp3911.c

@@ -111,8 +111,7 @@ static int mcp3911_write(struct mcp3911 *adc, u8 reg, u32 val, u8 len)
 	return spi_write(adc->spi, &val, len + 1);
 }
 
-static int mcp3911_update(struct mcp3911 *adc, u8 reg, u32 mask,
-		u32 val, u8 len)
+static int mcp3911_update(struct mcp3911 *adc, u8 reg, u32 mask, u32 val, u8 len)
 {
 	u32 tmp;
 	int ret;