The `MACAddressPolicy` can be only set to `persistent`, `random`, or
`none` (see systemd.link man page). There is no policy `keep`.
So correct `MACAddressPolicy` to `none`.
Fixes: f3f081e5420f ("TEST-{20,50,60,70): set MACAddressPolicy=keep")
[Link]
NamePolicy=keep kernel database onboard slot path
-MACAddressPolicy=keep
+MACAddressPolicy=none
[Link]
NamePolicy=mac
-MACAddressPolicy=keep
+MACAddressPolicy=none
[Link]
NamePolicy=mac
-MACAddressPolicy=keep
+MACAddressPolicy=none
[Link]
NamePolicy=mac
-MACAddressPolicy=keep
+MACAddressPolicy=none
[Link]
NamePolicy=keep kernel database onboard slot path
-MACAddressPolicy=keep
+MACAddressPolicy=none
[Link]
NamePolicy=mac
-MACAddressPolicy=keep
+MACAddressPolicy=none