scsi: aacraid: Fix memory leak in fib init path

scsi: aacraid: Fix memory leak in fib init path

commit 1bff5abca65d4b9761fcc992ab6288243220003d upstream.

aac_fib_map_free frees misaligned fib dma memory, additionally it does not
free up the whole memory.

Fixed by changing the  code to free up the correct and full memory
allocation.

Fixes: e8b12f0fb835223 ([SCSI] aacraid: Add new code for PMC-Sierra's SRC based controller family)
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <David.Carroll@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
[bwh: Backported to 3.2: s/max_cmd_size/max_fib_size/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>