[patch] rtc: jz4740: signedness bug

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platform_get_irq() can return negatives so the rtc->irq should be signed
to handle it.

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
index 2e16f72..cfcd2da 100644
--- a/drivers/rtc/rtc-jz4740.c
+++ b/drivers/rtc/rtc-jz4740.c
@@ -42,7 +42,7 @@ struct jz4740_rtc {
 
 	struct rtc_device *rtc;
 
-	unsigned int irq;
+	int irq;
 
 	spinlock_t lock;
 };
--
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