Bluetooth: qca: Fix sparse warnings

This fixes the following warnings:

drivers/bluetooth/hci_qca.c:1014:26: warning: cast to restricted __le16
drivers/bluetooth/hci_qca.c:1028:37: warning: cast to restricted __le32

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>