[media] media: rc: nuvoton: remove unneeded code in nvt_process_rx_ir_data

The definition of rawir includes the initialization already.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>