scsi: lpfc: Remove failing soft_wwn support

The soft_wwpn/soft_wwn functionality, which allows the driver to modify
service parameters in an attempt to override the adapter-assigned WWN, was
originally attempted to be removed roughly 6 yrs ago as new fabric features
were being introduced that clashed with the implementation.  In the end,
the feature was left in with the user being responsible if things went
south.

We've reached a point where soft_wwn is no longer functional and is failing
in almost all production use cases. Use of Fabric features such as Fabric
Assigned WWPN and Automatic DPORT is now prevalent and the features require
coordination between the adapter and driver that can't be solved by the
simplistic update of the service parameters. As it is no longer functional,
the feature is to be removed.

There are still ways to override the adapter-assigned WWN but they require
the admin to invoke bios/efi level menus.

Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Himanshu Madhani <[email protected]>
Co-developed-by: Dick Kennedy <[email protected]>
Signed-off-by: Dick Kennedy <[email protected]>
Signed-off-by: James Smart <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

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