scsi: lpfc: Fix unmap of dpp bars affecting next driver load

scsi: lpfc: Fix unmap of dpp bars affecting next driver load

BugLink: https://bugs.launchpad.net/bugs/1855303
When unattaching, the driver did not unmap the DPP bar. This caused the
next load of the driver, which attempts to enable wc, to not work correctly
and wc to be disabled due to an address mapping overlap.

Fix by unmapping on unattach.

Link: https://lore.kernel.org/r/20191218235808.31922-8-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 0b4391946da872e825efa3edfa932e44ae6e9cf9)
Signed-off-by: Vignesh Gunasekaran <vignesh.gunasekaran@broadcom.com>
Signed-off-by: Jeff Lane <jeffrey.lane@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>