net/ip: fix input packet filtering criteria
net/ip: fix input packet filtering criteria

The "is this packet for us?" filter in net_ipv4_input() has a minor
logic error which fails to discard many packets which are.. not for us.

Fixes: #14647

Signed-off-by: Charles E. Youse <5bc2c6f24e92b68873229a004438f1d6a77a3862@intel.com>

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