Remove static checker warning:

        drivers/irqchip/irq-keystone.c:166 keystone_irq_probe()
        warn: unsigned 'kirq->irq' is never less than zero.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Grygorii Strashko <[email protected]>
---
 drivers/irqchip/irq-keystone.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-keystone.c b/drivers/irqchip/irq-keystone.c
index fea26bc..608abf9 100644
--- a/drivers/irqchip/irq-keystone.c
+++ b/drivers/irqchip/irq-keystone.c
@@ -36,7 +36,7 @@ struct keystone_irq_device {
        struct device           *dev;
        struct irq_chip          chip;
        u32                      mask;
-       u32                      irq;
+       int                      irq;
        struct irq_domain       *irqd;
        struct regmap           *devctrl_regs;
        u32                     devctrl_offset;
-- 
1.9.1

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