of: Add dummy of_irq_to_resource_table() for IRQ_OF=n

If CONFIG_IRQ_OF=n:

drivers/built-in.o: In function `of_device_alloc':
(.text+0x72bce): undefined reference to `of_irq_to_resource_table'
make: *** [vmlinux] Error 1

of_device_alloc() calls of_irq_to_resource_table() with nr_irqs = 0 due
to of_irq_count() already being a dummy, so just add a dummy for
of_irq_to_resource_table(), too.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Rob Herring <robh@kernel.org>

include/linux/of_irq.h

@@ -37,8 +37,6 @@ extern int of_irq_parse_one(struct device_node *device, int index,
 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
 extern int of_irq_to_resource(struct device_node *dev, int index,
 			      struct resource *r);
-extern int of_irq_to_resource_table(struct device_node *dev,
-		struct resource *res, int nr_irqs);
 
 extern void of_irq_init(const struct of_device_id *matches);
 
@@ -46,6 +44,8 @@ extern void of_irq_init(const struct of_device_id *matches);
 extern int of_irq_count(struct device_node *dev);
 extern int of_irq_get(struct device_node *dev, int index);
 extern int of_irq_get_byname(struct device_node *dev, const char *name);
+extern int of_irq_to_resource_table(struct device_node *dev,
+		struct resource *res, int nr_irqs);
 #else
 static inline int of_irq_count(struct device_node *dev)
 {
@@ -59,6 +59,11 @@ static inline int of_irq_get_byname(struct device_node *dev, const char *name)
 {
 	return 0;
 }
+static inline int of_irq_to_resource_table(struct device_node *dev,
+					   struct resource *res, int nr_irqs)
+{
+	return 0;
+}
 #endif
 
 #if defined(CONFIG_OF)