PCI: Remove PCI_REASSIGN_ALL_RSRC use on arm and arm64

On arm, PCI_REASSIGN_ALL_RSRC is used only in pcibios_assign_all_busses(),
which helps decide whether to reconfigure bridge bus numbers.  It has
nothing to do with BAR assignments.  On arm64 and powerpc,
pcibios_assign_all_busses() tests PCI_REASSIGN_ALL_BUS, which makes more
sense.

Align arm with arm64 and powerpc, so they all use PCI_REASSIGN_ALL_BUS for
pcibios_assign_all_busses().

Remove PCI_REASSIGN_ALL_RSRC from the generic, Tegra, Versatile, and
R-Car drivers.  These drivers are used only on arm or arm64, where
PCI_REASSIGN_ALL_RSRC is not used after this change, so removing it
should have no effect.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

arch/arm/include/asm/pci.h

@@ -10,10 +10,7 @@ extern unsigned long pcibios_min_io;
 extern unsigned long pcibios_min_mem;
 #define PCIBIOS_MIN_MEM pcibios_min_mem
 
-static inline int pcibios_assign_all_busses(void)
-{
-	return pci_has_flag(PCI_REASSIGN_ALL_RSRC);
-}
+#define pcibios_assign_all_busses()	pci_has_flag(PCI_REASSIGN_ALL_BUS)
 
 #ifdef CONFIG_PCI_DOMAINS
 static inline int pci_proc_domain(struct pci_bus *bus)

arch/arm/kernel/bios32.c

@@ -527,7 +527,7 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw)
 	struct pci_sys_data *sys;
 	LIST_HEAD(head);
 
-	pci_add_flags(PCI_REASSIGN_ALL_RSRC);
+	pci_add_flags(PCI_REASSIGN_ALL_BUS);
 	if (hw->preinit)
 		hw->preinit();
 	pcibios_init_hw(parent, hw, &head);

drivers/pci/host/pci-host-common.c

@@ -142,7 +142,7 @@ int pci_host_common_probe(struct platform_device *pdev,
 
 	/* Do not reassign resources if probe only */
 	if (!pci_has_flag(PCI_PROBE_ONLY))
-		pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
+		pci_add_flags(PCI_REASSIGN_ALL_BUS);
 
 	list_splice_init(&resources, &bridge->windows);
 	bridge->dev.parent = dev;

drivers/pci/host/pci-tegra.c

@@ -2382,7 +2382,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 
 	tegra_pcie_enable_ports(pcie);
 
-	pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
+	pci_add_flags(PCI_REASSIGN_ALL_BUS);
 	host->busnr = pcie->busn.start;
 	host->dev.parent = &pdev->dev;
 	host->ops = &tegra_pcie_ops;

drivers/pci/host/pci-versatile.c

@@ -202,7 +202,7 @@ static int versatile_pci_probe(struct platform_device *pdev)
 	writel(0, versatile_cfg_base[0] + PCI_INTERRUPT_LINE);
 
 	pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
-	pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC);
+	pci_add_flags(PCI_REASSIGN_ALL_BUS);
 
 	list_splice_init(&pci_res, &bridge->windows);
 	bridge->dev.parent = dev;

drivers/pci/host/pcie-rcar.c

@@ -459,7 +459,7 @@ static int rcar_pcie_enable(struct rcar_pcie *pcie)
 
 	rcar_pcie_setup(&bridge->windows, pcie);
 
-	pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
+	pci_add_flags(PCI_REASSIGN_ALL_BUS);
 
 	bridge->dev.parent = dev;
 	bridge->sysdata = pcie;