[PATCH-next] liquidio: fix implicit irq include causing build failures

To fix

In file included from drivers/net/ethernet/cavium/liquidio/octeon_mem_ops.c:24:0:
drivers/net/ethernet/cavium/liquidio/octeon_device.h:216:2: error: expected specifier-qualifier-list before ‘irqreturn_t’
  irqreturn_t (*process_interrupt_regs)(void *);
  ^

as seen on arm64 allmodconfig builds.

Cc: Derek Chickles <redacted>
Cc: Satanand Burla <redacted>
Cc: Felix Manlunas <redacted>
Cc: Raghu Vatsavayi <redacted>
Signed-off-by: Paul Gortmaker <redacted>
---

[Seen on current linux-next, where similar implicit irq includes
 were recently revealed by some header shuffle somewhere.]

 drivers/net/ethernet/cavium/liquidio/octeon_device.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.h b/drivers/net/ethernet/cavium/liquidio/octeon_device.h
index c90ed48ae8ab..ad464788c923 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_device.h
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.h

@@ -22,6 +22,8 @@
 #ifndef _OCTEON_DEVICE_H_
 #define  _OCTEON_DEVICE_H_
 
+#include <linux/interrupt.h>
+
 /** PCI VendorId Device Id */
 #define  OCTEON_CN68XX_PCIID          0x91177d
 #define  OCTEON_CN66XX_PCIID          0x92177d

-- 
2.11.0