sh: Move arch_get_unmapped_area() in to arch/sh/mm/mmap.c.

Now that arch/sh/mm/mmap.c exists, move arch_get_unmapped_area() there.
Follows the ARM change.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/init.c

@@ -261,9 +261,11 @@ asmlinkage void __init sh_cpu_init(void)
 	cache_init();
 
 	if (raw_smp_processor_id() == 0) {
+#ifdef CONFIG_MMU
 		shm_align_mask = max_t(unsigned long,
 				       current_cpu_data.dcache.way_size - 1,
 				       PAGE_SIZE - 1);
+#endif
 
 		/* Boot CPU sets the cache shape */
 		detect_cache_shape();