Make ng_ubt2 (aka usb2_bluetooth_ng) driver only attach as "generic" driver
Make ng_ubt2 (aka usb2_bluetooth_ng) driver only attach as "generic" driver

Reviewed by:	HPS

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase