irqdomain: Introduce is_fwnode_irqchip helper

Since there will be several places checking if fwnode.type
is equal FWNODE_IRQCHIP, this patch adds a convenient function
for this purpose.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index a06feda..d72fabc 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -211,6 +211,11 @@
 	return node ? &node->fwnode : NULL;
 }
 
+static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode)
+{
+	return fwnode && fwnode->type == FWNODE_IRQCHIP;
+}
+
 static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
 							enum irq_domain_bus_token bus_token)
 {