PCI: amd-mdb: Correct IRQ number in INTx error message

The INTx devm_request_irq() failure path logs an incorrect IRQ number. The
printed 'irq' variable refers to a previous MDB interrupt mapping and does
not correspond to the INTx IRQ being requested.

Fix the error message to report pcie->intx_irq, which is the IRQ associated
with the failing request.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202512230112.AaiGqMWM-lkp@intel.com/
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Rakuram Eswaran <rakuram.e96@gmail.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sai Krishna Musham <sai.krishna.musham@amd.com>
Link: https://patch.msgid.link/20251223184003.32950-1-rakuram.e96@gmail.com

drivers/pci/controller/dwc/pcie-amd-mdb.c

@@ -389,7 +389,7 @@ static int amd_mdb_setup_irq(struct amd_mdb_pcie *pcie,
 			       IRQF_NO_THREAD, NULL, pcie);
 	if (err) {
 		dev_err(dev, "Failed to request INTx IRQ %d, err=%d\n",
-			irq, err);
+			pcie->intx_irq, err);
 		return err;
 	}