What's so special in the at76c503a chipset?

Hi folk!
  Just wandering... In the official kernel (2.6.8 and others), I can
find a file named drivers/net/wireless/atmel.c, which supports the
at76c502 at76c504 and at76c506 chipset. Why not at76c503a?
  Actually, the main point of my post is another: why isn't this driver
in the kernel? It looks very clean, and I cannot see why it shouldn't be
accepted. As an end-user, even if the compilation of this package is
extremely easy, I would like better to have it into the mainstream
kernel, which would make the build process even easier.

Hope this post won't raise some flame, but I really care about this. :-)

Thanks for your good work!


-- 
Saluti,
    Mardy
http://interlingua.altervista.org