rtc: hctosys: use function name in the error log

Use function name in the error log instead of __FILE__.
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/hctosys.c

@@ -33,7 +33,7 @@ static int __init rtc_hctosys(void)
 
 	if (rtc == NULL) {
 		pr_info("%s: unable to open rtc device (%s)\n",
-			__FILE__, CONFIG_RTC_HCTOSYS_DEVICE);
+			__func__, CONFIG_RTC_HCTOSYS_DEVICE);
 		goto err_open;
 	}