edac: rename edac_core.h to edac_mc.h

Now, all left at edac_core.h are at drivers/edac/edac_mc.c,
so rename it to edac_mc.h.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c
index 5f8543b..172598a 100644
--- a/drivers/edac/edac_module.c
+++ b/drivers/edac/edac_module.c
@@ -12,7 +12,7 @@
  */
 #include <linux/edac.h>
 
-#include "edac_core.h"
+#include "edac_mc.h"
 #include "edac_module.h"
 
 #define EDAC_VERSION "Ver: 3.0.0"