parisc: set_time() catch errors

set_rtc_time returns negative on error, ret should be signed to catch those

Signed-off-by: Roel Kluin <[e-mail]>
Reviewed-by: Grant Grundler <[e-mail]>
Signed-off-by: Kyle McMartin <[e-mail]>

drivers/rtc/rtc-parisc.c

···
 static int parisc_set_time(struct device *dev, struct rtc_time *tm)
 {
 	struct parisc_rtc *p = dev_get_drvdata(dev);
-	unsigned long flags, ret;
+	unsigned long flags;
+	int ret;
 
 	spin_lock_irqsave(&p->lock, flags);
 	ret = set_rtc_time(tm);