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/arch/ppc64/kernel/maple_pci.c b/arch/ppc64/kernel/maple_pci.c
index 0937649..b901470 100644
--- a/arch/ppc64/kernel/maple_pci.c
+++ b/arch/ppc64/kernel/maple_pci.c
@@ -275,7 +275,7 @@
 {
 	/* On G5, we move AGP up to high bus number so we don't need
 	 * to reassign bus numbers for HT. If we ever have P2P bridges
-	 * on AGP, we'll have to move pci_assign_all_busses to the
+	 * on AGP, we'll have to move pci_assign_all_buses to the
 	 * pci_controller structure so we enable it for AGP and not for
 	 * HT childs.
 	 * We hard code the address because of the different size of