staging:iio:meter:ade7753 should be 16 bit read not 8 bit for mode register.

Build tested only.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/meter/ade7753.c

@@ -398,9 +398,9 @@ static ssize_t ade7753_read_frequency(struct device *dev,
 		char *buf)
 {
 	int ret, len = 0;
-	u8 t;
+	u16 t;
 	int sps;
-	ret = ade7753_spi_read_reg_8(dev, ADE7753_MODE,	&t);
+	ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &t);
 	if (ret)
 		return ret;