plugins: on error-retry, don't print "Restoring RTC" twice

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

plugins/rtc.c

@@ -180,6 +180,7 @@ static void rtc_restore(void *arg)
 		rc = 2;
 	}
 
+	if (!rc)
 		print_desc(NULL, "Restoring system clock (UTC) from RTC");
 	tm.tm_isdst = -1; /* Use tzdata to figure it out, please. */
 	tv.tv_sec = mktime(&tm);