Locking fix and Memory leak Fixes

- Fix Locking code raises IRQ twice (NA)
- Fix mailbox and vpi memory leaks (126818)
Signed-off-by: NAlex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: NJames Smart <james.smart@emulex.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>