of/irq: Export of_irq_get()

The function will be used by the I2C core which can be compiled as a
module.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 1471e0a..0d77658 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -405,6 +405,7 @@
 
 	return irq_create_of_mapping(&oirq);
 }
+EXPORT_SYMBOL_GPL(of_irq_get);
 
 /**
  * of_irq_get_byname - Decode a node's IRQ and return it as a Linux irq number