I got the following information from Cisco
M1 and M2 servers with M81KR for VMWare 5.5 and 5.5U1 are supported via HCL with UCSM Del Mar MR2 - 2.1.3(x) starting Feb 25, 2014.
There will be no support of vSphere 5.5U2 (and beyond) for M1/M2 servers and M81KR adapter, via HCL or RPQ.
The only UCSM release that will support M1/M2 servers and M81KR for vSphere 5.5 and 5.5 u1 is 2.1.3(x)
Gen1 servers and Gen 1 adapters support will be dropped with the release of UCSM 3.0 (Q3FY14)
Which means the information on the VMware site is not correct ??