parisc: convert cpu_check_affinity to new cpumask api

cpumask arg to the affinity function is now const, sort
that out through the irq_desc implementations.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
diff --git a/arch/parisc/include/asm/irq.h b/arch/parisc/include/asm/irq.h
index 399c819..dfa26b6 100644
--- a/arch/parisc/include/asm/irq.h
+++ b/arch/parisc/include/asm/irq.h
@@ -49,7 +49,7 @@
 extern unsigned long txn_affinity_addr(unsigned int irq, int cpu);
 
 extern int cpu_claim_irq(unsigned int irq, struct irq_chip *, void *);
-extern int cpu_check_affinity(unsigned int irq, cpumask_t *dest);
+extern int cpu_check_affinity(unsigned int irq, const struct cpumask *dest);
 
 /* soft power switch support (power.c) */
 extern struct tasklet_struct power_tasklet;