ice: fix misuse of "link err" with "link status"

The ice_ptp_link_change function has a comment which mentions "link
err" when referring to the current link status. We are storing the status
of whether link is up or down, which is not an error.

It is appears that this use of err accidentally got included due to an
overzealous search and replace when removing the ice_status enum and local
status variable.

Fix the wording to use the correct term.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_ptp.c

@@ -1347,7 +1347,7 @@ int ice_ptp_link_change(struct ice_pf *pf, u8 port, bool linkup)
 	if (ptp_port->port_num != port)
 		return -EINVAL;
 
-	/* Update cached link err for this port immediately */
+	/* Update cached link status for this port immediately */
 	ptp_port->link_up = linkup;
 
 	if (!test_bit(ICE_FLAG_PTP, pf->flags))