Bluetooth: btbcm: Drop upper nibble version check from btbcm_initialize()

btbcm_initialize() must either return an error; or fill the passed in
fw_name, otherwise we end up passing uninitialized stack memory to
request_firmware().

Since we have a fallback hw_name of "BCM" not having a known version
in the subver field does not matter, drop the check so that we always
fill the passed in fw_name.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btbcm.c

@@ -440,10 +440,6 @@ int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len,
 			return err;
 	}
 
-	/* Upper nibble of rev should be between 0 and 3? */
-	if (((rev & 0xf000) >> 12) > 3)
-		return 0;
-
 	bcm_subver_table = (hdev->bus == HCI_USB) ? bcm_usb_subver_table :
 						    bcm_uart_subver_table;