[patch] PCI: xilinx-nwl: fix an error code in nwl_pcie_init_irq_domain()

[Dan Carpenter]

Returning PTR_ERR(legacy_intc_node) is zero which is success but we want
to return a negative error code.

Fixes: 4337ea1d4b10 ('PCI: xilinx-nwl: Add support for Xilinx NWL PCIe Host 
Controller')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/pci/host/pcie-xilinx-nwl.c 
b/drivers/pci/host/pcie-xilinx-nwl.c
index 7a2dc2e..5139e64 100644
--- a/drivers/pci/host/pcie-xilinx-nwl.c
+++ b/drivers/pci/host/pcie-xilinx-nwl.c
@@ -525,7 +525,7 @@ static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
        legacy_intc_node = of_get_next_child(node, NULL);
        if (!legacy_intc_node) {
                dev_err(pcie->dev, "No legacy intc node found\n");
-               return PTR_ERR(legacy_intc_node);
+               return -EINVAL;
        }
 
        pcie->legacy_irq_domain = irq_domain_add_linear(legacy_intc_node,