aacraid: Enable 64bit write to controller register

aacraid: Enable 64bit write to controller register

If writeq() not supported, then do atomic two 32bit write

Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Murthy Bhat <Murthy.Bhat@pmcs.com>
Reviewed-by: Karthikeya Sunkesula <Karthikeya.Sunkesula@pmcs.com>
Signed-off-by: Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
(cherry picked from commit c6992781d9e8086d592f95870092a59042d111a2)

Orabug: 25505509
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>