These warnings are emitted if non-modular network drivers are built.
Fixes just move cleanup_card() definitions into #ifdef MODULE region.

/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/wd.c:131: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/3c503.c:152: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/ne.c:216: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/hp.c:106: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/hp-plus.c:142: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/smc-ultra.c:172: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/e2100.c:144: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/es3210.c:159: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/lne390.c:149: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/lance.c:313: warning: 'cleanup_card' defined but not used
/.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/ac3200.c:127: warning: 'cleanup_card' defined but not used

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>