ptp: idt82p33: Make two variables static

Fix sparse warnings:

drivers/ptp/ptp_idt82p33.c:26:5: warning: symbol 'sync_tod_timeout' was not declared. Should it be static?
drivers/ptp/ptp_idt82p33.c:31:5: warning: symbol 'phase_snap_threshold' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/ptp/ptp_idt82p33.c

@@ -23,12 +23,12 @@ MODULE_VERSION("1.0");
 MODULE_LICENSE("GPL");
 
 /* Module Parameters */
-u32 sync_tod_timeout = SYNC_TOD_TIMEOUT_SEC;
+static u32 sync_tod_timeout = SYNC_TOD_TIMEOUT_SEC;
 module_param(sync_tod_timeout, uint, 0);
 MODULE_PARM_DESC(sync_tod_timeout,
 "duration in second to keep SYNC_TOD on (set to 0 to keep it always on)");
 
-u32 phase_snap_threshold = SNAP_THRESHOLD_NS;
+static u32 phase_snap_threshold = SNAP_THRESHOLD_NS;
 module_param(phase_snap_threshold, uint, 0);
 MODULE_PARM_DESC(phase_snap_threshold,
 "threshold (150000ns by default) below which adjtime would ignore");