[media] staging: media: cxd2099: remove memcpy of similar structure variables

structure variables can be assigned, no memcpy needed,
remove the memcpy and use assignment for the cfg and en variables.

Tested by Compilation Only

Suggested-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Devendra Naga <develkernel412222@gmail.com>
Cc: Ralph Metzler <rjkm@metzlerbros.de>
Cc: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>