qlogic: qed: fix error codes in qed_resc_alloc()

We accidentally return success instead of -ENOMEM here.

Fixes: fe56b9e6 ('qed: Add module with basic common support')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>