timbgpio: fix build

Use of get_irq_chip_data() et al.  requires including linux/irq.h
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Richard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/gpio/timbgpio.c

@@ -23,6 +23,7 @@
 #include <linux/module.h>
 #include <linux/gpio.h>
 #include <linux/platform_device.h>
+#include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/timb_gpio.h>
 #include <linux/interrupt.h>