V4L/DVB (5276): Cxusb: fix firmware patch for big endian systems

Without this patch, the device will not be detected after firmware download
on big endian systems.

Signed-off-by: Jin-Bong lee <jinbong.lee@samsung.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>