HID: hid/hid-input.c doesn't need to include linux/usb/input.h

There is no reason for generic hid-input.c to include usb-specific
input.h.

As a sideeffect, this also fixes warning of redefinition of dbg()
macro, when hid-input.c is compiled with DEBUG (as there is a clash
between dbg() from hid.h and usb/input.h).

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 95b9573..9cf591a 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -30,7 +30,6 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/kernel.h>
-#include <linux/usb/input.h>
 
 #undef DEBUG