Fix incomplete type error by including the correct header. Signed-off-by: Shiji Yang <yangshiji66@outlook.com> Link: https://github.com/openwrt/openwrt/pull/18744 Signed-off-by: Robert Marko <robimarko@gmail.com> (cherry picked from commit 29987d44bb3fb7d3cbe0fd2a4ce1519ceccd6c58) Signed-off-by: Nora Matthias Schiffer <neocturne@universe-factory.net> Link: https://github.com/openwrt/openwrt/pull/20440 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>