In the recent NSS-DP update FDB roaming fix we had was removed as in
testing no issue were reported, but after it was merged the old duplicate
MAC issue reappeared so lets port the previous FDB fix to work with newer
NSS-DP.
Fixes: 4ee444b5da ("kernel: qca-nss-dp: update to 12.4.5.r1")
Signed-off-by: Robert Marko <robimarko@gmail.com>
