rockchip: disable kernel preemption
This setting is more suitable for device running OpenWRT.
Most OpenWRT targets are already default to this configuration,
and it has shown better performance in VPN (wireguard).
Fix: #17454
Signed-off-by: Kien Truong <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17575
Signed-off-by: Robert Marko <[email protected]>
(cherry picked from commit 1c178f364454c5b73eb453fa0b101ae2f6454d4c)