MN10300: Provide a MN10300_CACHE_ENABLED config option

Provide a MN10300_CACHE_ENABLED config option as inverted logic of
MN10300_CACHE_DISABLED to make things simpler.

Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/include/asm/cacheflush.h b/arch/mn10300/include/asm/cacheflush.h
index 29e692f..b85be1d 100644
--- a/arch/mn10300/include/asm/cacheflush.h
+++ b/arch/mn10300/include/asm/cacheflush.h
@@ -34,7 +34,7 @@
 /*
  * physically-indexed cache management
  */
-#ifndef CONFIG_MN10300_CACHE_DISABLED
+#ifdef CONFIG_MN10300_CACHE_ENABLED
 
 extern void flush_icache_range(unsigned long start, unsigned long end);
 extern void flush_icache_page(struct vm_area_struct *vma, struct page *pg);
@@ -61,7 +61,7 @@
 /*
  * primitive routines
  */
-#ifndef CONFIG_MN10300_CACHE_DISABLED
+#ifdef CONFIG_MN10300_CACHE_ENABLED
 extern void mn10300_icache_inv(void);
 extern void mn10300_dcache_inv(void);
 extern void mn10300_dcache_inv_page(unsigned start);
@@ -103,7 +103,7 @@
 #define mn10300_dcache_flush_page(start)		do {} while (0)
 #define mn10300_dcache_flush_range(start, end)		do {} while (0)
 #define mn10300_dcache_flush_range2(start, size)	do {} while (0)
-#endif /* CONFIG_MN10300_CACHE_DISABLED */
+#endif /* CONFIG_MN10300_CACHE_ENABLED */
 
 /*
  * internal debugging function