[POWERPC] Correct AC Power: in /proc/pmu/info on ibook1

/proc/pmu/info contains AC Power: 0 when booting without battery.
Force AC Power, it will be updated whenever the battery state changes.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

drivers/macintosh/via-pmu.c

@@ -169,7 +169,7 @@ static int option_server_mode;
 
 int pmu_battery_count;
 int pmu_cur_battery;
-unsigned int pmu_power_flags;
+unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 static int query_batt_timer = BATTERY_POLLING_COUNT;
 static struct adb_request batt_req;