[PATCH] Kconfig: remove redundant NETDEVICES depends

drivers/net/Kconfig says:
# All the following symbols are dependent on NETDEVICES - do not repeat
# that for each of the symbols.

so remove duplicate 'depends' uses of NETDEVICES.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>