source package of 2.6.22-3-ixp4xx somehow missing ixp4xx_npe driver

[Nicola Fankhauser <nicola.fankhauser@variant.ch>]

hello everybody

since I wanted to try out ATA over ethernet on my NSLU2, and the 'aoe' 
module is missing in the 2.6.22-3-ixp4xx kernel, I fetched the source 
package of the 2.6.22-3-ixp4xx kernel, fired up menuconfig, made my 
choices, compiled it on the NLSU2 itself (takes ages) and was left with 
a kernel which had no ixp4xx_npe driver, even the kernel config is 
missing the "CONFIG_IXP4XX_NPE=" entry. interestingly, the binary 
package does have the driver.

how do I get the ethernet driver in my self-compiled kernel? thanks for 
any ideas.

--
regards
nicola