[SCSI] lpfc 8.3.3 : Fix a couple of spin_lock and memory issues and a crash

[SCSI] lpfc 8.3.3 : Fix a couple of spin_lock and memory issues and a crash

Contains the following changes:
- Fixed error paths retaking a spin lock which they already hold
- Added code to free memory in a couple of error paths
- Added code to free RPI bit map while unloading driver
- Added code to write zero to memory object allocated through dma_alloc_coherent
- Fixed crash/hang with target or LUN resets

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>