irqchip/mips-gic: Use gic_vpes instead of NR_CPUS

NR_CPUS is set by Kconfig and could be much higher than what actually is in the
system.

gic_vpes should be a true representitives of the number of cpus in the system,
so use it instead.

Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: <jason@lakedaemon.net>
Cc: <marc.zyngier@arm.com>
Cc: <jiang.liu@linux.intel.com>
Cc: <linux-mips@linux-mips.org>
Cc: <lisa.parratt@imgtec.com>
Cc: Qais Yousef <qsyousef@gmail.com>
Link: http://lkml.kernel.org/r/1449580830-23652-15-git-send-email-qais.yousef@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/irqchip/irq-mips-gic.c

@@ -465,7 +465,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
 	gic_map_to_vpe(irq, mips_cm_vp_id(cpumask_first(&tmp)));
 
 	/* Update the pcpu_masks */
-	for (i = 0; i < NR_CPUS; i++)
+	for (i = 0; i < gic_vpes; i++)
 		clear_bit(irq, pcpu_masks[i].pcpu_mask);
 	set_bit(irq, pcpu_masks[cpumask_first(&tmp)].pcpu_mask);
 
@@ -1098,8 +1098,8 @@ static void __init __gic_init(unsigned long gic_base_addr,
 
 	gic_ipi_domain->bus_token = DOMAIN_BUS_IPI;
 
-	/* Make the last 2 * NR_CPUS available for IPIs */
-	bitmap_set(ipi_resrv, gic_shared_intrs - 2 * NR_CPUS, 2 * NR_CPUS);
+	/* Make the last 2 * gic_vpes available for IPIs */
+	bitmap_set(ipi_resrv, gic_shared_intrs - 2 * gic_vpes, 2 * gic_vpes);
 
 	gic_basic_init();