HID: hid-debug.c should #include <linux/hid-debug.h>

Every file should include the headers containing the prototypes for
it's global functions.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/hid-debug.c

@@ -29,6 +29,7 @@
  */
 
 #include <linux/hid.h>
+#include <linux/hid-debug.h>
 
 struct hid_usage_entry {
 	unsigned  page;