CMXB7-2241:Eth MAC mismatch in DMCLI on Ethw mode
CMXB7-2241:Eth MAC mismatch in DMCLI on Ethw mode

Reason for change: In ethwan mode, dmcli of Ethernet Interface port 4 MACAddress updating as brlan0 MACAddress instead of erouter0 MACAddress
Test Procedure:
    * Load the image.
    * In Docsis mode, dmcli of Ethernet Interface of port 4 should be brlan0 MACAddress
    * In Ethwan mode, dmcli of Ethernet Interface of port 4 should be erouter0 MACAddress
Risks: Low
Signed-off-by:Saravanan Babu <saravanan.babu@commscope.com>

(cherry picked from commit c6b93c258ece900ffaaf6931f51a5e5535e92151)
Change-Id: I34b9b3abeac0c3f361fb2c540f586fb210a05d1b

rdkcmf/rdkb-CcspPandM,rdkcmf/rdkb-CcspPandM,rdkcmf/rdkb-CcspPandM