default or selected kernelversion does not have config value CONFIG_SCSI_DTC3280.
Result is shown for kernelversion 6.5.1

DTC3180/3280 SCSI support

modulename: dtc.ko

configname: CONFIG_SCSI_DTC3280

Linux Kernel Configuration
└─>Device Drivers
└─>SCSI device support
└─>SCSI low-level drivers
└─>DTC3180/3280 SCSI support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This is support for DTC 3180/3280 SCSI Host Adapters. Please read
the SCSI-HOWTO, available from
<http://www.tldp.org/docs.html#howto>, and the file
Documentation/scsi/dtc3x80.txt.

To compile this driver as a module, choose M here: the
module will be called dtc.

source code: