Remove useless wrappers of asm-generic/rmap.h

xtensa has a header (in its include/asm directory) that is a thin
wrapper around asm-generic/rmap.h. This wrapper is useless, since that
header doesn't exist. It is also unused (no file includes asm/rmap.h).

openrisc generates a similar header at build time (using a generic-y
entry in include/asm/Kbuild). This generated header is useless and
unused too.

Remove this header and this generic-y entry.

Signed-off-by: Paul Bolle <[e-mail]>
Signed-off-by: Michal Marek <[e-mail]>

arch/openrisc/include/asm/Kbuild

···
 generic-y += poll.h
 generic-y += posix_types.h
 generic-y += resource.h
-generic-y += rmap.h
 generic-y += scatterlist.h
 generic-y += sections.h
 generic-y += segment.h

arch/xtensa/include/asm/rmap.h

···
-/*
- * include/asm-xtensa/rmap.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_RMAP_H
-#define _XTENSA_RMAP_H
-
-#include <asm-generic/rmap.h>
-
-#endif