vtime: Describe overriden functions in dedicated arch headers

If the arch overrides some generic vtime APIs, let it describe
these on a dedicated and standalone header. This way it becomes
convenient to include it in vtime generic headers without irrelevant
stuff in such a low level header.

Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Li Zhong <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
diff --git a/include/linux/vtime.h b/include/linux/vtime.h
index b1dd2db..2ad0739 100644
--- a/include/linux/vtime.h
+++ b/include/linux/vtime.h
@@ -1,6 +1,10 @@
 #ifndef _LINUX_KERNEL_VTIME_H
 #define _LINUX_KERNEL_VTIME_H
 
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+#include <asm/vtime.h>
+#endif
+
 struct task_struct;
 
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING