powerpc/6xx: Use setup_timer() helper

Use setup_timer function instead of initializing timer with the
function and data fields.
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/tau_6xx.c

@@ -229,8 +229,7 @@ int __init TAU_init(void)
 
 
 	/* first, set up the window shrinking timer */
-	init_timer(&tau_timer);
-	tau_timer.function = tau_timeout_smp;
+	setup_timer(&tau_timer, tau_timeout_smp, 0UL);
 	tau_timer.expires = jiffies + shrink_timer;
 	add_timer(&tau_timer);