toradex apalis/colibri: use common USB product id fallback

All modules use the common g_dnl_bind_fixup implementaton which
calculates the PID according to product id (read from the config
block) plus offset of 0x4000. In case there is no config block
support (e.g. SPL) or in case the config block is not readable,
fall back to a generic product id (product id 0, which can be
interpreted as "Unknown Module").

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>