update TULIP MAINTAINERS

Kyle and I are co-maintaining tulip driver. Normally kyle will review
my patchs and submit them. I'll deal with bugzilla.kernel.org bugs and
try to resolve those bugs.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>