lpfc: Add Fabric assigned WWN support.

lpfc: Add Fabric assigned WWN support.

[backport of a2ed2d89b451f7ca26b049ea1664f4397c5df87b]
From: rkennedy <dick.kennedy@avagotech.com>

Orabug: 26439257

Adding support for Fabric assigned WWPN and WWNN.

Firmware sends first FLOGI to fabric with vendor version changes.
On link up driver gets updated service parameter with FAWWN assigned port
name.  Driver sends 2nd FLOGI with updated fawwpn and modifies the
vport->fc_portname in driver.

Note:
Soft wwpn will not be allowed when fawwpn is enabled.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Brian Maly <brian.maly@oracle.com>