macintosh/via-pmu: Make some symbols static

The sparse tool complains as follows:

drivers/macintosh/via-pmu.c:183:5: warning:
 symbol 'pmu_cur_battery' was not declared. Should it be static?
drivers/macintosh/via-pmu.c:190:5: warning:
 symbol '__fake_sleep' was not declared. Should it be static?

These symbols are not used outside of via-pmu.c, so this
commit marks them static.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210407125803.4138837-1-yukuai3@huawei.com

drivers/macintosh/via-pmu.c

@@ -180,14 +180,14 @@ static struct proc_dir_entry *proc_pmu_options;
 static int option_server_mode;
 
 int pmu_battery_count;
-int pmu_cur_battery;
+static int pmu_cur_battery;
 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;
 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 
-int __fake_sleep;
+static int __fake_sleep;
 int asleep;
 
 #ifdef CONFIG_ADB