rtc-isl12022: properly handle military hour format

Mask out PM flag when reading the hour, always set MIL bit when
writing the hour.

Signed-off-by: Roman Fietze <roman.fietze@telemotive.de>
Acked-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-isl12022.c

@@ -208,7 +208,7 @@ static int isl12022_set_datetime(struct i2c_client *client, struct rtc_time *tm)
 	/* hours, minutes and seconds */
 	buf[ISL12022_REG_SC] = bin2bcd(tm->tm_sec);
 	buf[ISL12022_REG_MN] = bin2bcd(tm->tm_min);
-	buf[ISL12022_REG_HR] = bin2bcd(tm->tm_hour);
+	buf[ISL12022_REG_HR] = bin2bcd(tm->tm_hour) | ISL12022_HR_MIL;
 
 	buf[ISL12022_REG_DT] = bin2bcd(tm->tm_mday);