ixgbe: Remove unneeded semicolon

./drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c:1305:2-3: Unneeded semicolon

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2688


Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>