[PATCH] Broadcom 4400 resume small fix (v2)

Changes from v1:
- Fix according to Francois Romieu comments.

LOG:
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 <redacted>
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