manifest: fix DPP remain_on_channel wait timeout

The remain_on_channel callback triggers cookie_event, which checks
pending_remain_on_channel before giving drv_resp_sem. Previously,
pending_remain_on_channel was set after calling
dev_ops->remain_on_channel, causing drv_resp_sem to timeout.
Move the pending_remain_on_channel assignment before invoking
dev_ops->remain_on_channel to ensure proper synchronization.

Signed-off-by: Maochen Wang <maochen.wang@nxp.com>