scsi: ibmvfc: Move event pool init/free routines

scsi: ibmvfc: Move event pool init/free routines

The next patch in this series reworks the event pool allocation calls to
happen within the individual queue allocation routines instead of as
independent calls.

Move the init/free routines earlier in ibmvfc.c to prevent undefined
reference errors when calling these functions from the queue allocation
code. No functional change.

Link: https://lore.kernel.org/r/20210114203148.246656-3-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>