PCI: generic,versatile: Remove unused pci_sys_data structures

Commit b3a72384fe29 ("ARM/PCI: Replace pci_sys_data->align_resource with
global function pointer") removed the struct pci_sys_data dependency from
the ARM pcibios functions that are part of the common ARM PCI arch
back-end, e.g., pcibios_align_resource(), so that struct pci_sys_data has
now become data that is only used internally by the ARM bios32 layer, i.e.,
pci_common_init_dev(), and by host controllers drivers callbacks, e.g.,
pci_sys_data.setup, that rely on the ARM bios32 API to probe.

PCI host controller drivers that do not rely on ARM bios32 calls to probe
do not need to have the pci_bus.sysdata pointer field pointing at a struct
pci_sys_data anymore, therefore it can be removed from the respective
drivers data structures.

Remove the pci_sys_data structures from the host controller drivers that do
not rely on ARM bios32 interface to scan the PCI bus, completing the
pci_sys_data clean-up and removing the related dependency on arch/arm
specific data.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
CC: Will Deacon <will.deacon@arm.com>
CC: Rob Herring <robh@kernel.org>

drivers/pci/host/pci-host-generic.c

@@ -38,16 +38,7 @@ struct gen_pci_cfg_windows {
 	struct gen_pci_cfg_bus_ops		*ops;
 };
 
-/*
- * ARM pcibios functions expect the ARM struct pci_sys_data as the PCI
- * sysdata.  Add pci_sys_data as the first element in struct gen_pci so
- * that when we use a gen_pci pointer as sysdata, it is also a pointer to
- * a struct pci_sys_data.
- */
 struct gen_pci {
-#ifdef CONFIG_ARM
-	struct pci_sys_data			sys;
-#endif
 	struct pci_host_bridge			host;
 	struct gen_pci_cfg_windows		cfg;
 	struct list_head			resources;

drivers/pci/host/pci-versatile.c

@@ -125,9 +125,6 @@ out_release_res:
 	return err;
 }
 
-/* Unused, temporary to satisfy ARM arch code */
-struct pci_sys_data sys;
-
 static int versatile_pci_probe(struct platform_device *pdev)
 {
 	struct resource *res;
@@ -208,7 +205,7 @@ static int versatile_pci_probe(struct platform_device *pdev)
 	pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
 	pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC);
 
-	bus = pci_scan_root_bus(&pdev->dev, 0, &pci_versatile_ops, &sys, &pci_res);
+	bus = pci_scan_root_bus(&pdev->dev, 0, &pci_versatile_ops, NULL, &pci_res);
 	if (!bus)
 		return -ENOMEM;