[PATCH] drivers/usb/host/ehci-xilinx-of.c: Include "linux/of_irq.h" to avoid compiling error

[Chen Gang]

Need include it for irq_of_parse_and_map(), the related error with
allmodconfig under microblaze:

  drivers/usb/host/ehci-xilinx-of.c: In function ‘ehci_hcd_xilinx_of_probe’:
  drivers/usb/host/ehci-xilinx-of.c:156:2: error: implicit declaration of function ‘irq_of_parse_and_map’ [-Werror=implicit-function-declaration]
    irq = irq_of_parse_and_map(dn, 0);
    ^

Signed-off-by: Chen Gang <gang.chen.5i5j at gmail.com>
---
 drivers/usb/host/ehci-xilinx-of.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index fe57710..a232836 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -31,6 +31,7 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
+#include <linux/of_irq.h>
 
 /**
  * ehci_xilinx_port_handed_over - hand the port out if failed to enable it
-- 
1.9.3