Bluetooth: hci_qca: Fixed issue during suspend

If BT SoC is running with ROM FW then just return in
qca_suspend function as ROM FW does not support
in-band sleep.

Fixes: 2be43aba ("Bluetooth: hci_qca: Wait for timeout during suspend")
Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>