ppc: rename pci_assign_all_busses to pci_assign_all_buses

... for consistency with ppc64 and to make merging easier.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-ppc/pci.h b/include/asm-ppc/pci.h
index 9dd06cd..643740d 100644
--- a/include/asm-ppc/pci.h
+++ b/include/asm-ppc/pci.h
@@ -24,9 +24,9 @@
  * Set this to 1 if you want the kernel to re-assign all PCI
  * bus numbers
  */
-extern int pci_assign_all_busses;
+extern int pci_assign_all_buses;
 
-#define pcibios_assign_all_busses()	(pci_assign_all_busses)
+#define pcibios_assign_all_busses()	(pci_assign_all_buses)
 #define pcibios_scan_all_fns(a, b)	0
 
 #define PCIBIOS_MIN_IO		0x1000