[PATCH] ppc: Fix m82xx_pci build

A recent patch updated the name of pci_assign_all_busses to
pci_assign_all_buses.  This instance of its use wasn't corrected
by the original patch to use the new name.

Builds cleanly on ads8272.
Signed-off-by: NBecky Bruce <becky.bruce@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/ppc/syslib/m82xx_pci.c

@@ -306,7 +306,7 @@ void __init pq2_find_bridges(void)
 	struct pci_controller * hose;
 	int host_bridge;
 
-	pci_assign_all_busses = 1;
+	pci_assign_all_buses = 1;
 
 	hose = pcibios_alloc_controller();