gpio: pca953x: use input from regs structure in pca953x_irq_pending()

While PCA_PCAL is defined for PCA953X type only, we still may use an
offset of the input from regs structure for sake of consistency.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Cc: Bartosz Golaszewski <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Thomas Petazzoni <[email protected]>
Cc: William Breathitt Gray <[email protected]>
Cc: Yury Norov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: andy-shev

drivers/gpio/gpio-pca953x.c

@@ -689,7 +689,7 @@ static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
 			return false;
 
 		/* Check latched inputs and clear interrupt status */
-		ret = pca953x_read_regs(chip, PCA953X_INPUT, cur_stat);
+		ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
 		if (ret)
 			return false;