tokenring/3c359.c:xl_init() must be __devinit

This patch fixes the following section mismatch:

<--  snip  -->

...
  MODPOST vmlinux
WARNING: drivers/built-in.o(.text+0x361ef1): Section mismatch: reference to .init.text:xl_init (between 'xl_probe' and 'xl_hw_reset')
...

<--  snip  -->

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>