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>

arch/sparc/include/asm/param.h

@@ -0,0 +1,22 @@
+#ifndef _ASMSPARC_PARAM_H
+#define _ASMSPARC_PARAM_H
+
+#ifdef __KERNEL__
+# define HZ		CONFIG_HZ	/* Internal kernel timer frequency */
+# define USER_HZ	100	/* .. some user interfaces are in "ticks" */
+# define CLOCKS_PER_SEC (USER_HZ)
+#endif
+
+#ifndef HZ
+#define HZ 100
+#endif
+
+#define EXEC_PAGESIZE	8192    /* Thanks for sun4's we carry baggage... */
+
+#ifndef NOGROUP
+#define NOGROUP		(-1)
+#endif
+
+#define MAXHOSTNAMELEN	64	/* max length of hostname */
+
+#endif