default or selected kernelversion does not have config value CONFIG_RT3090.
Result is shown for kernelversion 5.4.159

Ralink 3090 wireless support

modulename: rt3090sta.ko

configname: CONFIG_RT3090

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Wireless LAN
└─>Ralink 3090 wireless support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
This is an experimental driver for the Ralink 3090 wireless chip.

source code:
drivers/staging/rt3090/