[Coverity CID :187063] Control flow issues in /subsys/net/l2/ethernet/ethernet_mgmt.c

[mandarcthorat1]

Static code scan issues seen in File: /subsys/net/l2/ethernet/ethernet_mgmt.c
Category: Control flow issues
Function: ethernet_set_config
Component: Networking
CID: 187063
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996