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This includes bus reset & reloading a firmware. It should be sufficient
for a user space to (setup and) use a wireless device again.

Support for reset on USB & SDIO can be added later.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>