How to increase the value of multicast groups per SR-IOV VF in the `i40e` driver OR How to join more than 30 multicast groups per SR-IOV VF

Issue

• On RHEL 7.7 instance on RHOSP 13 (SR-IOV enabled compute node) when trying to join more than 30 multicast groups per SR-IOV VF and not able to do so
• How to increase the value of multicast groups per SR-IOV VF in the "i40e" driver
• Tests were done on a RHEL 7.7 instances running on another DPDK-enabled compute node and did not face this multicast group limitation
• Enabling multicast promiscuous mode on a trusted VF would be a feasible option but do not want to make use of it as it could have an impact on the performance
• When using i40e driver, Intel x710, SR-IOV and MCAST. There’s no error message, additional MCASTs get silently dropped (not joined)