The page https://docs.openshift.com/container-platform/4.12/networking/hardware_networks/using-dpdk-and-rdma.html#example-vf-use-in-rdma-mode-mellanox_using-dpdk-and-rdma highlights at point 1 the followings:
"Specify the device hex code of the SR-IOV network device. The only allowed values for Mellanox cards are 1015 and 1017."
This information is contradictory as from what gathered in Supported Devices page => https://docs.openshift.com/container-platform/4.11/networking/hardware_networks/about-sriov.html#supported-devices_about-sriov

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remove line "The only allowed values for Mellanox cards are 1015, 1017."