[PATCH v2] irqchip: exynos-combiner: Fix compilation error on ARM64

[Naveen Krishna Chatradhi]

The following compilation error occurs on 64-bit Exynos7 SoC:

drivers/irqchip/exynos-combiner.c: In function ‘combiner_irq_domain_map’:
drivers/irqchip/exynos-combiner.c:162:2: error: implicit declaration of function ‘set_irq_flags’ [-Werror=implicit-function-declaration]
  set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
  ^
drivers/irqchip/exynos-combiner.c:162:21: error: ‘IRQF_VALID’ undeclared (first use in this function)
  set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
                     ^
drivers/irqchip/exynos-combiner.c:162:21: note: each undeclared identifier is reported only once for each function it appears in
drivers/irqchip/exynos-combiner.c:162:34: error: ‘IRQF_PROBE’ undeclared (first use in this function)
  set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);

Fix the build error by including linux/interrupt.h.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen at samsung.com>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Jason Cooper <jason at lakedaemon.net>
Cc: Sudeep Holla <sudeep.holla at arm.com>
---
Changes since v1:
Used linux/interrupt.h instead of asm/hardirq.h

 drivers/irqchip/exynos-combiner.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index f8636a6..5945223 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/irqdomain.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/interrupt.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 
-- 
1.7.9.5