genirq: Move INPROGRESS, MASKED and DISABLED state flags to irq_data

We really need these flags for some of the interrupt chips. Move it
from internal state to irq_data and provide proper accessors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Daney <ddaney@caviumnetworks.com>
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index ec4806d..5e81d34 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -66,7 +66,7 @@
 	if (likely(!irqd_is_setaffinity_pending(idata)))
 		return;
 
-	if (unlikely(desc->istate & IRQS_DISABLED))
+	if (unlikely(irqd_irq_disabled(idata)))
 		return;
 
 	/*
@@ -74,7 +74,7 @@
 	 * threaded interrupt with ONESHOT set, we can end up with an
 	 * interrupt storm.
 	 */
-	masked = desc->istate & IRQS_MASKED;
+	masked = irqd_irq_masked(idata);
 	if (!masked)
 		idata->chip->irq_mask(idata);
 	irq_move_masked_irq(idata);