Zone the hba's to the sp ports of the CX, powerpath is for path management. if you haven't created the path from the hba to the storage then nothing will show.
I have a brand new R810 that EMC powerpath will not see the HBA's in.  They are seen in the SAN switch and not mapped to anything in the CX4 however they are showing a LUN mapped.  MPIO sees hitachi drives attached to them, the server contains local Hitachi drives.  Fighting this for a week +    2008R2 Enterprise Dell\EMC CX4-120 Brocade E200 Switches Powerpath 5.3 or 5.5 doesnt matter, neither see them.  
R810, QLE2460 not seen in powerpath