smp: Remove superfluous cond_func check in smp_call_function_many_cond()

It was requested to remove the cond_func check but the follow up patch was
overlooked. Remove it now.

Fixes: 67719ef2 ("smp: Add a smp_cond_func_t argument to smp_call_function_many()")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200127083915.434tdkztorkklpdu@linutronix.de

kernel/smp.c

@@ -435,7 +435,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
 
 	/* Fastpath: do that cpu by itself. */
 	if (next_cpu >= nr_cpu_ids) {
-		if (!cond_func || (cond_func && cond_func(cpu, info)))
+		if (!cond_func || cond_func(cpu, info))
 			smp_call_function_single(cpu, func, info, wait);
 		return;
 	}