PCI: dwc: Remove old MSI IRQs API

Remove the unused old MSI IRQs API from pcie-designware based on
struct msi_controller that should now be considered obsolete.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Niklas Cassel <niklas.cassel@axis.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h
index c80ee86..923f956 100644
--- a/drivers/pci/dwc/pcie-designware.h
+++ b/drivers/pci/dwc/pcie-designware.h
@@ -151,7 +151,7 @@ struct dw_pcie_host_ops {
 	u32 (*get_msi_data)(struct pcie_port *pp, int pos);
 	void (*scan_bus)(struct pcie_port *pp);
 	void (*set_num_vectors)(struct pcie_port *pp);
-	int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
+	int (*msi_host_init)(struct pcie_port *pp);
 	void (*msi_irq_ack)(int irq, struct pcie_port *pp);
 };