CONFIG_MPC8540_ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
Freescale MPC8540 ADS
modulename: mpc85xx_ads.ko
configname: CONFIG_MPC8540_ADS
Linux Kernel Configuration
└─>Freescale Book-E Machine Type
└─>Freescale MPC8540 ADS
In linux kernel since version 2.6.12
This option enables support for the MPC 8540 ADS board