scsi: lpfc: Add embedded data pointers for enhanced performance

scsi: lpfc: Add embedded data pointers for enhanced performance

BugLink: http://bugs.launchpad.net/bugs/1752182
The current driver isn't taking advantage of a performance hint whereby
the initial data buffer descriptor can be placed in the WQE as well as
the SGL.

Add the logic to detect support for the feature and to use it when
supported.

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: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 0bc2b7c5317bd51df571e9d1131547901215f6c9 linux-next)
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>