cpumask: remove the now-obsoleted pcibus_to_cpumask(): powerpc

cpumask_of_pcibus() is the new version.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

arch/powerpc/include/asm/topology.h

@@ -36,11 +36,6 @@ static inline int pcibus_to_node(struct pci_bus *bus)
 }
 #endif
 
-#define pcibus_to_cpumask(bus)	(pcibus_to_node(bus) == -1 ? \
-					CPU_MASK_ALL : \
-					node_to_cpumask(pcibus_to_node(bus)) \
-				)
-
 #define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
 				 cpu_all_mask :				\
 				 cpumask_of_node(pcibus_to_node(bus)))