[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/include/asm-mips/fpu.h b/include/asm-mips/fpu.h
index b0f5001..8bf510a 100644
--- a/include/asm-mips/fpu.h
+++ b/include/asm-mips/fpu.h
@@ -138,10 +138,9 @@
 	if (cpu_has_fpu) {
 		if ((tsk == current) && __is_fpu_owner())
 			_save_fp(current);
-		return tsk->thread.fpu.hard.fpr;
 	}
 
-	return tsk->thread.fpu.soft.fpr;
+	return tsk->thread.fpu.fpr;
 }
 
 #endif /* _ASM_FPU_H */