blackfin/irq: Use access helper irq_data_get_affinity_mask()

This is a preparatory patch for moving irq_data struct members.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Link: http://lkml.kernel.org/r/20150713125611.652550580@linutronix.deSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/blackfin/mach-common/ints-priority.c

@@ -194,7 +194,8 @@ void bfin_internal_unmask_irq(unsigned int irq)
 #ifdef CONFIG_SMP
 static void bfin_internal_unmask_irq_chip(struct irq_data *d)
 {
-	bfin_internal_unmask_irq_affinity(d->irq, d->affinity);
+	bfin_internal_unmask_irq_affinity(d->irq,
+					  irq_data_get_affinity_mask(d));
 }
 
 static int bfin_internal_set_affinity(struct irq_data *d,