net/mlx5: Fix check for allocation failure in comp_irqs_request_pci()

This function accidentally dereferences "cpus" instead of returning
directly.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202305200354.KV3jU94w-lkp@intel.com/
Fixes: b48a0f72 ("net/mlx5: Refactor completion irq request/release code")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/eq.c

@@ -824,7 +824,7 @@ static int comp_irqs_request_pci(struct mlx5_core_dev *dev)
 	ncomp_eqs = table->num_comp_eqs;
 	cpus = kcalloc(ncomp_eqs, sizeof(*cpus), GFP_KERNEL);
 	if (!cpus)
-		ret = -ENOMEM;
+		return -ENOMEM;
 
 	i = 0;
 	rcu_read_lock();