btc: Enable support to send HCI raw cmd read remote ver. to stack.

BTC module will not send HCI read remote feature command to stack,
so removing this support and enabling support to send HCI raw
command read remote version to stack.

Change-Id: I63e23110e2347b629f11315f3ba6f517a30c57ec
(cherry picked from commit 765afe4418389c668dca8d9562fc55ac2dd9667a)
(cherry picked from commit 076f2ba41548e2f9802456e7bebce86ea75c241a)
(cherry picked from commit f30860ff64ebe815f20e8be2e70a145c286ff8b2)