scsi: ibmvfc: Rename ibmvfc_scsi_channels to ibmvfc_channels

There is nothing scsi specific about the ibmvfc_scsi_channels struct. It is
meant to encapsulate a set of channels regardless of protocol.

Remove _scsi from the struct name to reflect this genric nature.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Link: https://lore.kernel.org/r/20230921225435.3537728-7-tyreld@linux.ibm.com


Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>