sh: rename pg-mmu.c -> cache.c, enable generically.

This builds in the newly created cache.c (renamed from pg-mmu.c) for both
MMU and NOMMU configurations. The kmap_coherent() stubs and alias
information recorded by each CPU family takes care of doing the right
thing while enabling the code to be commonly shared.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/cacheflush.h

@@ -45,7 +45,6 @@ extern void __flush_purge_region(void *start, int size);
 extern void __flush_invalidate_region(void *start, int size);
 #endif
 
-#ifdef CONFIG_MMU
 #define ARCH_HAS_FLUSH_ANON_PAGE
 extern void __flush_anon_page(struct page *page, unsigned long);
 
@@ -55,7 +54,6 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
 	if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
 		__flush_anon_page(page, vmaddr);
 }
-#endif
 
 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
 static inline void flush_kernel_dcache_page(struct page *page)

arch/sh/mm/Makefile_32

@@ -2,20 +2,20 @@
 # Makefile for the Linux SuperH-specific parts of the memory manager.
 #
 
-obj-y			:= init.o extable_32.o consistent.o mmap.o
+obj-y			:= cache.o init.o extable_32.o consistent.o mmap.o
 
 ifndef CONFIG_CACHE_OFF
-cache-$(CONFIG_CPU_SH2)		:= cache-sh2.o
-cache-$(CONFIG_CPU_SH2A)	:= cache-sh2a.o
-cache-$(CONFIG_CPU_SH3)		:= cache-sh3.o
-cache-$(CONFIG_CPU_SH4)		:= cache-sh4.o flush-sh4.o
-cache-$(CONFIG_SH7705_CACHE_32KB)	+= cache-sh7705.o
+cacheops-$(CONFIG_CPU_SH2)		:= cache-sh2.o
+cacheops-$(CONFIG_CPU_SH2A)		:= cache-sh2a.o
+cacheops-$(CONFIG_CPU_SH3)		:= cache-sh3.o
+cacheops-$(CONFIG_CPU_SH4)		:= cache-sh4.o flush-sh4.o
+cacheops-$(CONFIG_SH7705_CACHE_32KB)	+= cache-sh7705.o
 endif
 
-obj-y			+= $(cache-y)
+obj-y			+= $(cacheops-y)
 
 mmu-y			:= tlb-nommu.o pg-nommu.o
-mmu-$(CONFIG_MMU)	:= fault_32.o kmap.o tlbflush_32.o ioremap_32.o pg-mmu.o
+mmu-$(CONFIG_MMU)	:= fault_32.o kmap.o tlbflush_32.o ioremap_32.o
 
 obj-y			+= $(mmu-y)
 obj-$(CONFIG_DEBUG_FS)	+= asids-debugfs.o