scsi: qedf: Fix a return value in case of error in 'qedf_alloc_global_queues'

We should return -ENOMEM in case of memory allocation error, as done
elsewhere in this function.

[mkp: fixed typo]

Fixes: 61d8658b ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>