[NetKVM] BZ#958755 BZ#958751 Broken RX statistics fixed

Due to regression in RX statistics mechanism number of HCK
tests started to fail. Failures were seen at least at:

1. 2c_OidsNdisRequest(1104) on windows 2012
2. NDISTest 6.5 - [2 Machines] - Stats job(1070) on windows 2012

Both tests pass with this fix.