cleanup compat ioctl handling

Merge all compat ioctl handling into compat_ioctl.c instead of splitting it
over compat.c and compat_ioctl.c.  This also allows to get rid of ioctl32.h

Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks-good-to: Andi Kleen <ak@suse.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/ioctl32.h

@@ -1,17 +0,0 @@
-#ifndef IOCTL32_H
-#define IOCTL32_H 1
-
-#include <linux/compiler.h>	/* for __deprecated */
-
-struct file;
-
-typedef int (*ioctl_trans_handler_t)(unsigned int, unsigned int,
-					unsigned long, struct file *);
-
-struct ioctl_trans {
-	unsigned long cmd;
-	ioctl_trans_handler_t handler;
-	struct ioctl_trans *next;
-};
-
-#endif