Bluetooth: Disable High Speed by default

Bluetooth High Speed requires hardware support which is very uncommon
nowadays since HS has not pickup interest by the industry.

From https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-3-luiz.dentz@gmail.com/
By Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Change-Id: I9b731761667e940b664731a4372a2679f1d76613