net: bridge: use common function to compute the features

net: bridge: use common function to compute the features

Previously, bridge ignored all features propagation and DST retention,
only handling explicitly the GSO limits.

By switching to the new helper netdev_compute_master_upper_features(), the bridge
now expose additional features, depending on the lowers capabilities.

Since br_set_gso_limits() is already covered by the helper, it can be
removed safely.

Bridge has it's own way to update needed_headroom. So we don't need to
update it in the helper.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20251017034155.61990-5-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>