All documentation points to no, it's not possible
http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-701112.html
● On the Cisco Nexus 2000 Series Fabric Extenders (FEX modules) connected to the Cisco Nexus 7000 Series Switches, all interfaces must be assigned to the same VDC, as shown in Figure 9.