[PATCH] Input: fix an OOPS in HID driver

This patch fixes an OOPS in HID driver when connecting simulation
devices generating unknown simulation events.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>