Greetings.
B200M2 with M81KR adapter is supported up through blade release 2.13 firmware level. The M81KR support stops at 2.13 code level for B200M2 blades.
The UCSM Infrastructure can be 2.2xx as long as 2.13 blade level is the version on the blade in question. When referencing the Interop matrix for driver info, you use the blade firmware level.
I would push the latest 2.13 bundle available to your B200M2 blade, and then update to the supported enic driver, which is 2.3.0.4. The highest FNIC driver supported for you blade and the 2.13 firmware is 2.1.0.25
You may be able to get other fnic and enic drivers at higher revisions to update, but you will be in an unsupported configuration that hasn't been tested or approved, and would be asked to match a supported configuration when calling into TAC for support.
Thanks,
Kirk...