Alternatively follow this tutorial.
But in short: only single bridge can be HW offloaded. You have to use single bridge with VLAN filtering enabled.
Your config is: bridge with member ports sfp-sfpplus1, sfp-sfpplus2, sfp-sfpplus3 and sfp-sfpplus4. sfp-sfpplus1 is tagged member of all 3 VLANs, other sfp-sfpplusX ports are untagged members of corresponding VLANs.