CONFIG_TQM8548 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

TQ Components TQM8548

configname: CONFIG_TQM8548

Linux Kernel Configuration
└─>Machine Type
└─>TQ Components TQM8548
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option enables support for the TQ Components TQM8548 board.