[ethmac] Status of Open Ethernet MAC Core / Eventual Contribution

[97024 Hendra Gunawan <hendrag01@students.ee.itb.ac.id>]

hi'

i've already test all modules of Rx, it works, but i've made a
litte change in rx_mac.v.  
i've made a little change on the sequence of the code, cause
when i simulate  Rx module using MOdelSim 5.4a, it didn't works, so i
tried to made a change till it works.