Bluetooth: hci_bcm4377: Use correct unit for timeouts

BCM4377_TIMEOUT is always used to wait for completitions and their API
expects a timeout in jiffies instead of msecs.

Fixes: 8a061276 ("Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boards")
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>