net: dsa: mt7530: Add TBF qdisc offload support

Introduce port_setup_tc callback in mt7530 dsa driver in order to enable
dsa ports rate shaping via hw Token Bucket Filter (TBF) for hw switched
traffic.

Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241031-mt7530-tc-offload-v2-1-cb242ad954a0@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>