Add channel context operations (add, remove, change, assign and
unassign) to enable support for multiple channels.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NRajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>