ath79: tiny: increment compat version for RE355/RE450
Bump compat version to 3.0 for TP-Link RE355 v1, RE450 v1 and RE450 v2.
Was missed for 25.12; users upgrading from older images need sysupgrade -F.
Signed-off-by: Ivan Diaz <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/22185
Signed-off-by: Robert Marko <[email protected]>