default or selected kernelversion does not have config value CONFIG_DM_MULTIPATH_RDAC.
Result is shown for kernelversion 5.19-rc1

LSI/Engenio RDAC multipath support (EXPERIMENTAL)

modulename: dm-rdac.ko

configname: CONFIG_DM_MULTIPATH_RDAC

Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
└─>LSI/Engenio RDAC multipath support (EXPERIMENTAL)
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Multipath support for LSI/Engenio RDAC.

source code:
drivers/md/