[MIPS] Unify mips_fpu_soft_struct and mips_fpu_hard_structs.

The struct mips_fpu_soft_struct and mips_fpu_hard_struct are
completely same now and the kernel fpu emulator assumes that.  This
patch unifies them to mips_fpu_struct and get rid of mips_fpu_union.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
index 8150f07..a9bf6cc 100644
--- a/arch/mips/kernel/irixsig.c
+++ b/arch/mips/kernel/irixsig.c
@@ -260,7 +260,7 @@
 
 		for(i = 0; i < 32; i++)
 			error |= __get_user(fregs[i], &context->fpregs[i]);
-		error |= __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
+		error |= __get_user(current->thread.fpu.fcr31, &context->fpcsr);
 	}
 
 	/* XXX do sigstack crapola here... XXX */