[PATCH] ppc64: Fix error in vDSO 32 bits date

The implementation of __kernel_gettimeofday() in the 32 bits vDSO has a
small bug (a typo actually) that will cause it to lose 1 bit of precision.
Not terribly bad but worth fixing.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/vdso32/gettimeofday.S

@@ -109,7 +109,7 @@ __do_get_xsec:
 	lwz	r6,(CFG_TB_TO_XS+4)(r9)
 	mulhwu	r4,r7,r5
 	mulhwu	r6,r7,r6
-	mullw	r6,r7,r5
+	mullw	r0,r7,r5
 	addc	r6,r6,r0
 
 	/* At this point, we have the scaled xsec value in r4 + XER:CA