Fix compilation of this macro under gcc-4.9 for MIPS32.

Some point after gcc-4.2 the MIPS inline assembly restrictions changed -
=h (hi register) disappeared from the list of restrictions and can no
longer be used.

So, until someone requires an assembly version of this function,
just use a non-assembly version and let the compiler sort it out.

Suggested by:	kan

contrib/gcc/longlong.h

@@ -584,11 +584,11 @@ UDItype __umulsidi3 (USItype, USItype);
 
 #if defined (__mips__) && W_TYPE_SIZE == 32
 #define umul_ppmm(w1, w0, u, v) \
-  __asm__ ("multu %2,%3"						\
-	   : "=l" ((USItype) (w0)),					\
-	     "=h" ((USItype) (w1))					\
-	   : "d" ((USItype) (u)),					\
-	     "d" ((USItype) (v)))
+	do {								\
+	UDItype __x = (UDItype) (USItype) (u) * (USItype) (v);		\
+	 w1 = __x >> 32;						\
+	 w0 = __x;							\
+	} while (0)
 #define UMUL_TIME 10
 #define UDIV_TIME 100
 #endif /* __mips__ */