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

[Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>]

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 asm/hardirq.h.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 drivers/irqchip/exynos-combiner.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index f8636a6..7fbedcc 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -18,6 +18,8 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 
+#include <asm/hardirq.h>
+
 #include "irqchip.h"
 
 #define COMBINER_ENABLE_SET	0x0
-- 
1.7.9.5

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