powerpc/PCI: replace pci_probe_only with pci_flags

We already use pci_flags, so this just sets pci_flags directly and removes
the intermediate step of figuring out pci_probe_only, then using it to set
pci_flags.

The PCI core provides a pci_flags definition (currently __weak), so drop
the powerpc definitions in favor of that.

CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/powerpc/kernel/pci-common.c

@@ -50,9 +50,6 @@ static int global_phb_number;		/* Global phb counter */
 /* ISA Memory physical address */
 resource_size_t isa_mem_base;
 
-/* Default PCI flags is 0 on ppc32, modified at boot on ppc64 */
-unsigned int pci_flags = 0;
-
 
 static struct dma_map_ops *pci_dma_ops = &dma_direct_ops;
 

arch/powerpc/kernel/pci_64.c

@@ -33,8 +33,6 @@
 #include <asm/machdep.h>
 #include <asm/ppc-pci.h>
 
-unsigned long pci_probe_only = 0;
-
 /* pci_io_base -- the base address from which io bars are offsets.
  * This is the lowest I/O base address (so bar values are always positive),
  * and it *must* be the start of ISA space if an ISA bus exists because
@@ -55,9 +53,6 @@ static int __init pcibios_init(void)
 	 */
 	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
 
-	if (pci_probe_only)
-		pci_add_flags(PCI_PROBE_ONLY);
-
 	/* On ppc64, we always enable PCI domains and we keep domain 0
 	 * backward compatible in /proc for video cards
 	 */

arch/powerpc/kernel/rtas_pci.c

@@ -276,7 +276,7 @@ void __init find_and_init_phbs(void)
 	pci_devs_phb_init();
 
 	/*
-	 * pci_probe_only and pci_assign_all_buses can be set via properties
+	 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
 	 * in chosen.
 	 */
 	if (of_chosen) {
@@ -284,8 +284,12 @@ void __init find_and_init_phbs(void)
 
 		prop = of_get_property(of_chosen,
 				"linux,pci-probe-only", NULL);
-		if (prop)
-			pci_probe_only = *prop;
+		if (prop) {
+			if (*prop)
+				pci_add_flags(PCI_PROBE_ONLY);
+			else
+				pci_clear_flags(PCI_PROBE_ONLY);
+		}
 
 #ifdef CONFIG_PPC32 /* Will be made generic soon */
 		prop = of_get_property(of_chosen,