[Coverity CID :190928]Error handling issues in /samples/net/sockets/echo_async/src/socket_echo.c

[mandarcthorat1]

Static code scan issues seen in File: /samples/net/sockets/echo_async/src/socket_echo.c
Category: Error handling issues
Function: main
Component: Samples
CID: 190928
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[jukkar]

This is not about CAN but to generic socket, setting label and assigning to @pfalcon