net: config: Fix improper condition in net_config_init
net: config: Fix improper condition in net_config_init

Currently, there is a case for net_config_init function that for
timeout==0 and when iface is already up, the ip setup is not proceed
and the error message "Timeout while waiting network..." is logged.

This commit fixes it.

Signed-off-by: Lukasz Maciejonczyk <12a52743b42a5ad3dc4d3a6e4f8a76d0ad7c6806@nordicsemi.no>

Vudentz/zephyr,Vudentz/zephyr,nashif/zephyr,nashif/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,Vudentz/zephyr,Vudentz/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr