mem: Move cache_impl.hh to cache.cc

There is no longer any need to keep the implementation in a header.

src/mem/cache/base.hh

@@ -47,8 +47,8 @@
  * Declares a basic cache interface BaseCache.
  */
 
-#ifndef __BASE_CACHE_HH__
-#define __BASE_CACHE_HH__
+#ifndef __MEM_CACHE_BASE_HH__
+#define __MEM_CACHE_BASE_HH__
 
 #include <algorithm>
 #include <list>
@@ -597,4 +597,4 @@ class BaseCache : public MemObject
 
 };
 
-#endif //__BASE_CACHE_HH__
+#endif //__MEM_CACHE_BASE_HH__

src/mem/cache/cache.hh

@@ -49,8 +49,8 @@
  * Describes a cache based on template policies.
  */
 
-#ifndef __CACHE_HH__
-#define __CACHE_HH__
+#ifndef __MEM_CACHE_CACHE_HH__
+#define __MEM_CACHE_CACHE_HH__
 
 #include "base/misc.hh" // fatal, panic, and warn
 #include "mem/cache/base.hh"
@@ -491,4 +491,4 @@ class CacheBlkIsDirtyVisitor : public CacheBlkVisitor
     bool _isDirty;
 };
 
-#endif // __CACHE_HH__
+#endif // __MEM_CACHE_CACHE_HH__