CONFIG_EP8248E is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Embedded Planet EP8248E (a.k.a. CWH-PPC-8248N-VE)

modulename: ep8248e.ko

configname: CONFIG_EP8248E

Linux Kernel Configuration
└─>82xx-based boards (PQ II)
└─>Embedded Planet EP8248E (a.k.a. CWH-PPC-8248N-VE)
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
This enables support for the Embedded Planet EP8248E board.

This board is also resold by Freescale as the QUICCStart
MPC8248 Evaluation System and/or the CWH-PPC-8248N-VE.

source code: