sh: Tie sparseirq in to Kconfig.

Now that the dependent patches are merged, we are ready to enable
sparseirq support. This simply adds the Kconfig option, and then converts
from the _cpu to the _node allocation routines to follow the upstream
sparseirq API changes.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/irq/ipr.c

@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
+#include <linux/topology.h>
 
 static inline struct ipr_desc *get_ipr_desc(unsigned int irq)
 {
@@ -59,21 +60,17 @@ void register_ipr_controller(struct ipr_desc *desc)
 
 	for (i = 0; i < desc->nr_irqs; i++) {
 		struct ipr_data *p = desc->ipr_data + i;
-#ifdef CONFIG_SPARSE_IRQ
 		struct irq_desc *irq_desc;
-#endif
 
 		BUG_ON(p->ipr_idx >= desc->nr_offsets);
 		BUG_ON(!desc->ipr_offsets[p->ipr_idx]);
 
-#ifdef CONFIG_SPARSE_IRQ
-		irq_desc = irq_to_desc_alloc_cpu(p->irq, smp_processor_id());
+		irq_desc = irq_to_desc_alloc_node(p->irq, numa_node_id());
 		if (unlikely(!irq_desc)) {
 			printk(KERN_INFO "can not get irq_desc for %d\n",
 			       p->irq);
 			continue;
 		}
-#endif
 
 		disable_irq_nosync(p->irq);
 		set_irq_chip_and_handler_name(p->irq, &desc->chip,