wl12xx: Add AP related configuration to conf_drv_settings

Rate class configuration has been split up for AP and STA modes.
Template related configuration likewise separated.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>