staging: iio: adc: add spaces around binary operators

Add spaces around binary operators like -, +, * etc
in order to improve readability

Signed-off-by: Ioana Ciornei <[e-mail]>
Reviewed-by: Daniel Baluta <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/iio/adc/ad7816.c

···
 	u16 rdwr_pin;
 	u16 convert_pin;
 	u16 busy_pin;
-	u8  oti_data[AD7816_CS_MAX+1];
+	u8  oti_data[AD7816_CS_MAX + 1];
 	u8  channel_id;	/* 0 always be temperature */
 	u8  mode;
 };