drivers/rtc/rtc-pcf8563.c: use PTR_RET()

Use of PTR_RET() simplifies the code.

Signed-off-by: Sachin Kamat <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/rtc/rtc-pcf8563.c

···
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/err.h>
 
 #define DRV_VERSION "0.4.3"
 
···
 				pcf8563_driver.driver.name,
 				&pcf8563_rtc_ops, THIS_MODULE);
 
-	if (IS_ERR(pcf8563->rtc))
-		return PTR_ERR(pcf8563->rtc);
-
-	return 0;
+	return PTR_RET(pcf8563->rtc);
 }
 
 static const struct i2c_device_id pcf8563_id[] = {