board_f: Make relocation functions generic

This header file is used by three archs. It could be used by all of them
since relocation is a common function. Move it into a generic file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/xtensa/include/asm/relocate.h b/arch/xtensa/include/asm/relocate.h
deleted file mode 100644
index 9c4ce23..0000000
--- a/arch/xtensa/include/asm/relocate.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- * Copyright (C) 2016 Cadence Design Systems Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#ifndef _ASM_XTENSA_RELOCATE_H
-#define _ASM_XTENSA_RELOCATE_H
-
-#include <common.h>
-
-int clear_bss(void);
-
-#endif	/* _ASM_XTENSA_RELOCATE_H */
diff --git a/arch/xtensa/lib/relocate.c b/arch/xtensa/lib/relocate.c
index 3f747ec..010c1b0 100644
--- a/arch/xtensa/lib/relocate.c
+++ b/arch/xtensa/lib/relocate.c
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#include <asm/relocate.h>
+#include <relocate.h>
 #include <asm/sections.h>
 #include <asm/string.h>