arm,tegra: replace cpu_set() with modern api

cpu_set() is marked as obsolete cpumask function and we plan to
remove it in future.

This patch replace it with modern cpumask function.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-tegra@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Colin Cross <ccross@android.com>

arch/arm/mach-tegra/platsmp.c

@@ -122,7 +122,7 @@ void __init smp_init_cpus(void)
 	}
 
 	for (i = 0; i < ncores; i++)
-		cpu_set(i, cpu_possible_map);
+		set_cpu_possible(i, true);
 
 	set_smp_cross_call(gic_raise_softirq);
 }