asmlinkage: Revert "lto: Make asmlinkage __visible"

As requested by Linus, revert adding __visible to asmlinkage.
Instead we add __visible explicitely to all the symbols
that need it.

This reverts commit 128ea04a9885af9629059e631ddf0cab4815b589.

Link: http://lkml.kernel.org/r/1398984278-29319-2-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index 34a513a..a6a42dd 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -12,9 +12,9 @@
 #endif
 
 #ifdef __cplusplus
-#define CPP_ASMLINKAGE extern "C" __visible
+#define CPP_ASMLINKAGE extern "C"
 #else
-#define CPP_ASMLINKAGE __visible
+#define CPP_ASMLINKAGE
 #endif
 
 #ifndef asmlinkage