default or selected kernelversion does not have config value CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA.
Result is shown for kernelversion 6.9.9

MDMA2+DbDMA IDE for AMD Alchemy Au1200

configname: CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA

IDE Mode for AMD Alchemy Au1200
└─>MDMA2+DbDMA IDE for AMD Alchemy Au1200
In linux kernel since version 2.6.20 (release Date: 2007-02-04)