linux-firmware: add missing license

linux-firmware: add missing license

Some license were part of the linux-firmware but were not added to the
recipe, so adding those missing license

Signed-off-by: Vivek Puar <vpuar@qti.qualcomm.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>