rtc: s5m: Check return value of s5m_check_peding_alarm_interrupt()

s5m_check_peding_alarm_interrupt() in s5m_rtc_read_alarm() gets the return
value, but doesn't use it.
This modifies using the s5m_check_peding_alarm_interrupt()"s return value
as the s5m_rtc_read_alarm()'s return value.

Cc: Krzysztof Kozlowski <[e-mail]>
Cc: Bartlomiej Zolnierkiewicz <[e-mail]>
Cc: [e-mail]
Signed-off-by: Nobuhiro Iwamatsu <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Alexandre Belloni <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/rtc/rtc-s5m.c

···
 
 	dev_dbg(dev, "%s: %ptR(%d)\n", __func__, &alrm->time, alrm->time.tm_wday);
 
-	ret = s5m_check_peding_alarm_interrupt(info, alrm);
-
-	return 0;
+	return s5m_check_peding_alarm_interrupt(info, alrm);
 }
 
 static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)