Staging: add USB MTK bluetooth driver

This driver is for the Mediatek Bluetooth that can be found in many
different laptops.  It was written by Mediatek, but cleaned up to
work properly in the kernel tree by SUSE.

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Changes since v1:
 1.fixed built error , because build path typo.
 2.change to correct version number.

Signed-off-by: Cho, Yu-Chen <acho@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>