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: NDmitriy Monakhov <dmonakhov@openvz.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>