iio:light:ltr501 bug in parameter sanity check.

Clearly the intent was to error if the value was not 0 or 1.
As implemented we have (A != 0 || A != 1) which is always true
as A is never both 0 and 1 at the same time.

As the autobuilder suggested, && makes more sense for this error
check.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Acked-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/light/ltr501.c

@@ -976,7 +976,7 @@ static int ltr501_write_event_config(struct iio_dev *indio_dev,
 	int ret;
 
 	/* only 1 and 0 are valid inputs */
-	if (state != 1  || state != 0)
+	if (state != 1  && state != 0)
 		return -EINVAL;
 
 	switch (chan->type) {