PCI: of_property: Constify parameter in of_pci_get_addr_flags()

The res parameter has no reason to be a pointer to an un-const struct
resource. Indeed, struct resource is not supposed to be modified by the
function.

Constify the res parameter.

Link: https://lore.kernel.org/r/20250224141356.36325-5-herve.codina@bootlin.com
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>

Author: hcodina

drivers/pci/of_property.c

@@ -69,7 +69,7 @@ static void of_pci_set_address(struct pci_dev *pdev, u32 *prop, u64 addr,
 	}
 }
 
-static int of_pci_get_addr_flags(struct resource *res, u32 *flags)
+static int of_pci_get_addr_flags(const struct resource *res, u32 *flags)
 {
 	u32 ss;