scsi: aacraid: added support for init_struct_8

scsi: aacraid: added support for init_struct_8

BugLink: http://bugs.launchpad.net/bugs/1668726
This  patch lays the groundwork for supporting the new HBA-1000 controller
family.A new INIT structure INIT_STRUCT_8 has been added which allows for a
variable size for MSI-x vectors among other things,  and is used for both
Series-8, HBA-1000 and SmartIOC-2000.

Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@microsemi.com>
Signed-off-by: Dave Carroll <David.Carroll@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from linux-next commit d1ef4da8487fa698ab619a14b8ab6394bb5156ca)
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>