default or selected kernelversion does not have config value CONFIG_SERIAL_68328.
Result is shown for kernelversion 6.5.1

68328 serial support

modulename: 68328serial.ko

configname: CONFIG_SERIAL_68328

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>68328 serial support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This driver supports the built-in serial port of the Motorola 68328
(standard, EZ and VZ varieties).

source code: