pinctrl: armada-37xx: Fix spurious irq management

Until now, if we found spurious irq in irq_handler, we only updated the
status in register but not the status in the code. Due to this the system
will got stuck dues to the infinite loop

[gregory.clement@bootlin.com: update comment and add fix and stable tags]
Fixes: 30ac0d3b ("pinctrl: armada-37xx: Add edge both type gpio irq support")
Cc: <stable@vger.kernel.org>
Signed-off-by: NTerry Zhou <bjzhou@marvell.com>
Reviewed-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

@@ -666,12 +666,13 @@ static void armada_37xx_irq_handler(struct irq_desc *desc)
 					writel(1 << hwirq,
 					       info->base +
 					       IRQ_STATUS + 4 * i);
-					continue;
+					goto update_status;
 				}
 			}
 
 			generic_handle_irq(virq);
 
+update_status:
 			/* Update status in case a new IRQ appears */
 			spin_lock_irqsave(&info->irq_lock, flags);
 			status = readl_relaxed(info->base +