default or selected kernelversion does not have config value CONFIG_NETPOLL_RX.
Result is shown for kernelversion 5.4.123

Netpoll support for trapping incoming packets

configname: CONFIG_NETPOLL_RX

Linux Kernel Configuration
└─>Networking support
└─>Netpoll support for trapping incoming packets
In linux kernel since version 2.6.12  
depends
CONFIG_NETPOLL or &