/usr/lib/ibdm1.2/ibnl/Cheetah.ibnl is in libibdm1 1.2-OFED-1.4.2-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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TOPSYSTEM Cheetah,MHGS18-XT,MT25204 NODE CA 1 MT25204 U1 1 -> P1