x86/headers: Convert uses of _fpstate_ia32 to _fpstate_32

Remove uses of _fpstate_ia32 from the kernel, and move the
legacy _fpstate_ia32 definition to the user-space only portion
of the header.

Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1441438363-9999-9-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/include/uapi/asm/sigcontext32.h

@@ -26,7 +26,7 @@ struct sigcontext_ia32 {
        __u32				flags;
        __u32				sp_at_signal;
        __u16				ss, __ssh;
-       __u32				fpstate;	/* Pointer to 'struct _fpstate_ia32' */
+       __u32				fpstate;	/* Pointer to 'struct _fpstate_32' */
        __u32				oldmask;
        __u32				cr2;
 };