USB: chaoskey: fix Alea quirk on big-endian hosts

Add missing endianness conversion when applying the Alea timeout quirk.

Found using sparse:

	warning: restricted __le16 degrades to integer

Fixes: e4a886e8 ("hwrng: chaoskey - Fix URB warning due to timeout on Alea")
Cc: stable <stable@vger.kernel.org>     # 4.8
Cc: Bob Ham <bob.ham@collabora.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>