CONFIG_PXA_SHARPSL is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SHARP Zaurus SL-5600, SL-C7xx and SL-Cxx00 Models

configname: CONFIG_PXA_SHARPSL

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>SHARP Zaurus SL-5600, SL-C7xx and SL-Cxx00 Models
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here if you intend to run this kernel on a
Sharp Zaurus SL-5600 (Poodle), SL-C700 (Corgi),
SL-C750 (Shepherd), SL-C760 (Husky), SL-C1000 (Akita),
SL-C3000 (Spitz), SL-C3100 (Borzoi) or SL-C6000x (Tosa)
handheld computer.