sparc, sparc64: use arch/sparc/include

The majority of this patch was created by the following script:

***
ASM=arch/sparc/include/asm
mkdir -p $ASM
git mv include/asm-sparc64/ftrace.h $ASM
git rm include/asm-sparc64/*
git mv include/asm-sparc/* $ASM
sed -ie 's/asm-sparc64/asm/g' $ASM/*
sed -ie 's/asm-sparc/asm/g' $ASM/*
***

The rest was an update of the top-level Makefile to use sparc
for header files when sparc64 is being build.
And a small fixlet to pick up the correct unistd.h from
sparc64 code.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

include/asm-sparc/btfixup.h → arch/sparc/include/asm/btfixup.h

 /*
- *  asm-sparc/btfixup.h:    Macros for boot time linking.
+ *  asm/btfixup.h:    Macros for boot time linking.
  *
  *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  */

include/asm-sparc/bugs.h → arch/sparc/include/asm/bugs.h

-/* include/asm-sparc/bugs.h:  Sparc probes for various bugs.
+/* include/asm/bugs.h:  Sparc probes for various bugs.
  *
  * Copyright (C) 1996, 2007 David S. Miller (davem@davemloft.net)
  */

include/asm-sparc/cacheflush.h → arch/sparc/include/asm/cacheflush.h

 #ifndef ___ASM_SPARC_CACHEFLUSH_H
 #define ___ASM_SPARC_CACHEFLUSH_H
 #if defined(__sparc__) && defined(__arch64__)
-#include <asm-sparc/cacheflush_64.h>
+#include <asm/cacheflush_64.h>
 #else
-#include <asm-sparc/cacheflush_32.h>
+#include <asm/cacheflush_32.h>
 #endif
 #endif

include/asm-sparc/checksum.h → arch/sparc/include/asm/checksum.h

 #ifndef ___ASM_SPARC_CHECKSUM_H
 #define ___ASM_SPARC_CHECKSUM_H
 #if defined(__sparc__) && defined(__arch64__)
-#include <asm-sparc/checksum_64.h>
+#include <asm/checksum_64.h>
 #else
-#include <asm-sparc/checksum_32.h>
+#include <asm/checksum_32.h>
 #endif
 #endif

include/asm-sparc/cpudata.h → arch/sparc/include/asm/cpudata.h

 #ifndef ___ASM_SPARC_CPUDATA_H
 #define ___ASM_SPARC_CPUDATA_H
 #if defined(__sparc__) && defined(__arch64__)
-#include <asm-sparc/cpudata_64.h>
+#include <asm/cpudata_64.h>
 #else
-#include <asm-sparc/cpudata_32.h>
+#include <asm/cpudata_32.h>
 #endif
 #endif