staging: brcm80211: revert removal of atomic initialization

The commit "staging: brcm80211: remove code for unsupported chip"
unintentionally got rid of initialization of the atomic variable
brcmf_mmc_suspend. The patch restore that particular piece of code.
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc.c

@@ -980,6 +980,8 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func,
 			return -ENOMEM;
 		sdiodev->func1 = func;
 		dev_set_drvdata(&func->card->dev, sdiodev);
+
+		atomic_set(&brcmf_mmc_suspend, false);
 	}
 
 	gInstance->func[func->num] = func;