RHEL-113425: net/mlx5: Not returning mlx5_link_info table when speed is unknown

Li Tianrequested to merge
litian1/centos-stream-10:main into main

JIRA: https://issues.redhat.com/browse/RHEL-113425

Tested: functionally tested on Azure VM.

Signed-off-by: Li Tian litian@redhat.com

Edited by Li Tian

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