Broadcom 4400 resume small fix

Some issues in b44_resume().

- Return value of pci_enable_device() was ignored.

- If request_irq() has failed we have to just disable device and exit.

Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>