rtc: ep93xx: fix checkpatch issues

Fix sysfs attribute declaration as suggested by checkpatch.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-ep93xx.c

@@ -15,10 +15,10 @@
 #define EP93XX_RTC_DATA			0x000
 #define EP93XX_RTC_MATCH		0x004
 #define EP93XX_RTC_STATUS		0x008
-#define  EP93XX_RTC_STATUS_INTR		 (1<<0)
+#define  EP93XX_RTC_STATUS_INTR		 BIT(0)
 #define EP93XX_RTC_LOAD			0x00C
 #define EP93XX_RTC_CONTROL		0x010
-#define  EP93XX_RTC_CONTROL_MIE		 (1<<0)
+#define  EP93XX_RTC_CONTROL_MIE		 BIT(0)
 #define EP93XX_RTC_SWCOMP		0x108
 #define  EP93XX_RTC_SWCOMP_DEL_MASK	 0x001f0000
 #define  EP93XX_RTC_SWCOMP_DEL_SHIFT	 16
@@ -87,7 +87,7 @@ static const struct rtc_class_ops ep93xx_rtc_ops = {
 	.proc		= ep93xx_rtc_proc,
 };
 
-static ssize_t ep93xx_rtc_show_comp_preload(struct device *dev,
+static ssize_t comp_preload_show(struct device *dev,
 				 struct device_attribute *attr, char *buf)
 {
 	unsigned short preload;
@@ -96,9 +96,9 @@ static ssize_t ep93xx_rtc_show_comp_preload(struct device *dev,
 
 	return sprintf(buf, "%d\n", preload);
 }
-static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_rtc_show_comp_preload, NULL);
+static DEVICE_ATTR_RO(comp_preload);
 
-static ssize_t ep93xx_rtc_show_comp_delete(struct device *dev,
+static ssize_t comp_delete_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
 	unsigned short delete;
@@ -107,7 +107,7 @@ static ssize_t ep93xx_rtc_show_comp_delete(struct device *dev,
 
 	return sprintf(buf, "%d\n", delete);
 }
-static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_rtc_show_comp_delete, NULL);
+static DEVICE_ATTR_RO(comp_delete);
 
 static struct attribute *ep93xx_rtc_attrs[] = {
 	&dev_attr_comp_preload.attr,