msm: ipa3: Fix to map the npn phy address only once

Ethenet driver npn phy address was same for UL/DL
pipes, currently this address was mapped twice.
Added changes to map the map npn phy address only
once.

Change-Id: Icd713943326aad38ecf8e080a73d1d6bb8f641d2
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>