staging: iio: ad7780: Remove exceptional & on function name

Remove & from function pointers to conform to the style found elsewhere
in the file.  Done using the following semantic patch

// <smpl>
@r@
identifier f;
@@

f(...) { ... }
@@
identifier r.f;
@@

- &f
+ f
// </smpl>
Signed-off-by: Nsimran singhal <singhalsimran0@gmail.com>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/staging/iio/adc/ad7780.c

@@ -154,7 +154,7 @@ static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
 };
 
 static const struct iio_info ad7780_info = {
-	.read_raw = &ad7780_read_raw,
+	.read_raw = ad7780_read_raw,
 	.driver_module = THIS_MODULE,
 };