xtensa: move headers files to arch/xtensa/include

Move all header files for xtensa to arch/xtensa/include and platform and
variant header files to the appropriate arch/xtensa/platforms/ and
arch/xtensa/variants/ directories.

Moving the files gets also rid of all uses of symlinks in the Makefile.

This has been completed already for the majority of the architectures
and xtensa is one out of six missing.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Chris Zankel <chris@zankel.net>

arch/xtensa/lib/checksum.S

@@ -16,7 +16,7 @@
 
 #include <asm/errno.h>
 #include <linux/linkage.h>
-#include <asm/variant/core.h>
+#include <variant/core.h>
 
 /*
  * computes a partial checksum, e.g. for TCP/UDP fragments

arch/xtensa/lib/memcopy.S

@@ -9,7 +9,7 @@
  * Copyright (C) 2002 - 2005 Tensilica Inc.
  */
 
-#include <asm/variant/core.h>
+#include <variant/core.h>
 
 	.macro	src_b	r, w0, w1
 #ifdef __XTENSA_EB__

arch/xtensa/lib/memset.S

@@ -11,7 +11,7 @@
  *  Copyright (C) 2002 Tensilica Inc.
  */
 
-#include <asm/variant/core.h>
+#include <variant/core.h>
 
 /*
  * void *memset(void *dst, int c, size_t length)

arch/xtensa/lib/strncpy_user.S

@@ -11,7 +11,7 @@
  *  Copyright (C) 2002 Tensilica Inc.
  */
 
-#include <asm/variant/core.h>
+#include <variant/core.h>
 #include <linux/errno.h>
 
 /* Load or store instructions that may cause exceptions use the EX macro. */

arch/xtensa/lib/strnlen_user.S

@@ -11,7 +11,7 @@
  *  Copyright (C) 2002 Tensilica Inc.
  */
 
-#include <asm/variant/core.h>
+#include <variant/core.h>
 
 /* Load or store instructions that may cause exceptions use the EX macro. */
 

arch/xtensa/lib/usercopy.S

@@ -53,7 +53,7 @@
  *	a11/ original length
  */
 
-#include <asm/variant/core.h>
+#include <variant/core.h>
 
 #ifdef __XTENSA_EB__
 #define ALIGN(R, W0, W1) src	R, W0, W1