tools: ynl: switch away from MNL_CB_*

Create a local version of the MNL_CB_* parser control values.

Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Link: https://lore.kernel.org/r/20240227223032.1835527-13-kuba@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>