powerpc/powermac: Make some functions static

These functions can all be static, make it so. Fix warnings treated as
errors with W=1:

  arch/powerpc/platforms/powermac/pci.c:1022:6: error: no previous prototype for ‘pmac_pci_fixup_ohci’
  arch/powerpc/platforms/powermac/pci.c:1057:6: error: no previous prototype for ‘pmac_pci_fixup_cardbus’
  arch/powerpc/platforms/powermac/pci.c:1094:6: error: no previous prototype for ‘pmac_pci_fixup_pciata’

Remove has_address declaration and assignment since it's not used.
Also add gcc attribute unused to fix a warning treated as error with
W=1:

  arch/powerpc/platforms/powermac/pci.c:784:19: error: variable ‘has_address’ set but not used
  arch/powerpc/platforms/powermac/pci.c:907:22: error: variable ‘ht’ set but not used
Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powermac/pci.c

@@ -781,12 +781,12 @@ static int __init pmac_add_bridge(struct device_node *dev)
 	struct resource rsrc;
 	char *disp_name;
 	const int *bus_range;
-	int primary = 1, has_address = 0;
+	int primary = 1;
 
 	DBG("Adding PCI host bridge %pOF\n", dev);
 
 	/* Fetch host bridge registers address */
-	has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
+	of_address_to_resource(dev, 0, &rsrc);
 
 	/* Get bus range if any */
 	bus_range = of_get_property(dev, "bus-range", &len);
@@ -904,7 +904,7 @@ static int pmac_pci_root_bridge_prepare(struct pci_host_bridge *bridge)
 void __init pmac_pci_init(void)
 {
 	struct device_node *np, *root;
-	struct device_node *ht = NULL;
+	struct device_node *ht __maybe_unused = NULL;
 
 	pci_set_flags(PCI_CAN_SKIP_ISA_ALIGN);
 
@@ -1019,7 +1019,7 @@ static bool pmac_pci_enable_device_hook(struct pci_dev *dev)
 	return true;
 }
 
-void pmac_pci_fixup_ohci(struct pci_dev *dev)
+static void pmac_pci_fixup_ohci(struct pci_dev *dev)
 {
 	struct device_node *node = pci_device_to_OF_node(dev);
 
@@ -1054,7 +1054,7 @@ void __init pmac_pcibios_after_init(void)
 	}
 }
 
-void pmac_pci_fixup_cardbus(struct pci_dev* dev)
+static void pmac_pci_fixup_cardbus(struct pci_dev *dev)
 {
 	if (!machine_is(powermac))
 		return;
@@ -1091,7 +1091,7 @@ void pmac_pci_fixup_cardbus(struct pci_dev* dev)
 
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
 
-void pmac_pci_fixup_pciata(struct pci_dev* dev)
+static void pmac_pci_fixup_pciata(struct pci_dev *dev)
 {
        u8 progif = 0;