ipq806x: config-6.6: add new option

ipq806x: config-6.6: add new option

6.6.93 introduced new config option[1]

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.93&id=fba6e5d44fb8df6bdadb1e90d2ddca715462248f

Signed-off-by: John Audia <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19026
Signed-off-by: Nick Hainke <[email protected]>
(cherry picked from commit a2eaadeed263133a43f0043bc283ee5b620f410c)
Link: https://github.com/openwrt/openwrt/pull/19113
Signed-off-by: Hauke Mehrtens <[email protected]>