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/layerscape_edac.c b/drivers/edac/layerscape_edac.c
index 6c59d89..94cac76 100644
--- a/drivers/edac/layerscape_edac.c
+++ b/drivers/edac/layerscape_edac.c
@@ -16,7 +16,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
-#include "edac_core.h"
+#include "edac_module.h"
 #include "fsl_ddr_edac.h"
 
 static const struct of_device_id fsl_ddr_mc_err_of_match[] = {