mpt3sas: Add support for configurable Chain Frame Size

mpt3sas: Add support for configurable Chain Frame Size

BugLink: http://bugs.launchpad.net/bugs/1512221
Added support for configurable Chain Frame Size. Calculate the
Chain Message Frame size from the IOCMaxChainSegementSize (iocfacts).
Applicable only for mpt3sas/SAS3.0 HBA's.

Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 84619ca86eb0797aad61f962dafa82788861c4e0)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>