[PATCH] tile: add init.h to usb.c to avoid compile failure

[Paul Gortmaker <paul.gortmaker@windriver.com>]

Pending header cleanups will reveal this file is using the
init.h content implicitly with the following fail:

arch/tile/kernel/usb.c:69:1: warning: data definition has no type or storage class [enabled by default]
arch/tile/kernel/usb.c:69:1: error: type defaults to 'int' in declaration of 'arch_initcall'
arch/tile/kernel/usb.c:69:1: warning: parameter names (without types) in function declaration [enabled by default]
arch/tile/kernel/usb.c:62:19: warning: 'tilegx_usb_init' defined but not used

Explicitly add init.h to get arch_initcall and avoid this.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

[adding this to the header move series of commits; see
 https://lkml.kernel.org/r/1433276168-21550-1-git-send-email-paul.gortmaker@windriver.com
 for original series posting. ]

 arch/tile/kernel/usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/tile/kernel/usb.c b/arch/tile/kernel/usb.c
index 5af8debc6a71..f0da5a237e94 100644
--- a/arch/tile/kernel/usb.c
+++ b/arch/tile/kernel/usb.c
@@ -21,6 +21,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
 #include <linux/usb/tilegx.h>
+#include <linux/init.h>
 #include <linux/types.h>
 
 static u64 ehci_dmamask = DMA_BIT_MASK(32);
-- 
2.2.1