MIPS: math-emu: Cleanup stdarg usage including apparently bogus comment.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/math-emu/ieee754dp.c b/arch/mips/math-emu/ieee754dp.c
index 53dbb1c..a8eb014 100644
--- a/arch/mips/math-emu/ieee754dp.c
+++ b/arch/mips/math-emu/ieee754dp.c
@@ -23,6 +23,7 @@
  * ########################################################################
  */
 
+#include <stdarg.h>
 #include <linux/compiler.h>
 
 #include "ieee754dp.h"