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

Use Rx Polling (NAPI) (EXPERIMENTAL)

configname: CONFIG_ADAPTEC_STARFIRE_NAPI

Linux Kernel Configuration
└─>Networking support
└─>Ethernet (10 or 100Mbit)
└─>Use Rx Polling (NAPI) (EXPERIMENTAL)
In linux kernel since version 2.6.12  
NAPI is a new driver API designed to reduce CPU and interrupt load
when the driver is receiving lots of packets from the card. It is
still somewhat experimental and thus not yet enabled by default.

If your estimated Rx load is 10kpps or more, or if the card will be
deployed on potentially unfriendly networks (e.g. in a firewall),
then say Y here.

See Documentation/networking/NAPI_HOWTO.txt for more
information.

If in doubt, say N.

depends
CONFIG_ADAPTEC_STARFIRE
CONFIG_EXPERIMENTAL
CONFIG_NETDEVICES
NOT CONFIG_UML