Consolidate the init script for platforms based on the same driver with
the same logic.
The btbmc and hciuart drivers are used in the ccmp1 and cc95.
The btnxpuart driver is used in the cc91 and cc93.
The btdigi driver is used in the cc8 platforms with the qca65x4 driver.
https://onedigi.atlassian.net/browse/DEL-9949
Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>
3408f8c4ed