CONFIG_MPC834x_MDS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Freescale MPC834x MDS

modulename: mpc834x_mds.ko

configname: CONFIG_MPC834x_MDS

Machine Type
└─>Freescale MPC834x MDS
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
This option enables support for the MPC 834x MDS evaluation board.

Be aware that PCI buses can only function when MDS board is plugged
into the PIB (Platform IO Board) board from Freescale which provide
3 PCI slots. The PIBs PCI initialization is the bootloader's
responsibility.

source code: