unicore32 rtc driver fix: cleanup irq_set_freq and irq_set_state

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
diff --git a/arch/unicore32/kernel/rtc.c b/arch/unicore32/kernel/rtc.c
index c5f0682..8cad70b 100644
--- a/arch/unicore32/kernel/rtc.c
+++ b/arch/unicore32/kernel/rtc.c
@@ -88,11 +88,6 @@
 	return 0;
 }
 
-static int puv3_rtc_setfreq(struct device *dev, int freq)
-{
-	return 0;
-}
-
 /* Time read/write */
 
 static int puv3_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
@@ -214,8 +209,6 @@
 	.set_time	= puv3_rtc_settime,
 	.read_alarm	= puv3_rtc_getalarm,
 	.set_alarm	= puv3_rtc_setalarm,
-	.irq_set_freq	= puv3_rtc_setfreq,
-	.irq_set_state	= puv3_rtc_setpie,
 	.proc	        = puv3_rtc_proc,
 };
 
@@ -294,8 +287,6 @@
 
 	puv3_rtc_enable(pdev, 1);
 
-	puv3_rtc_setfreq(&pdev->dev, 1);
-
 	/* register RTC and exit */
 
 	rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,