[ARM] Move rest of MMU setup code from mm-armv.c to mmu.c

If we're going to have mmu.c for code which is specific to the MMU
machines, we might as well move the other MMU initialisation
specific code from mm-armv.c into this new file.  This also allows
us to make some functions static.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/mm.h

@@ -17,7 +17,6 @@ struct map_desc;
 struct meminfo;
 struct pglist_data;
 
-void __init build_mem_type_table(void);
 void __init create_mapping(struct map_desc *md);
 void __init bootmem_init(struct meminfo *mi);
 void reserve_node_zero(struct pglist_data *pgdat);