usb: misc: ks_bridge: Add snapshot of ks_bridge driver

Add snapshot of latest version of ks_bridge driver as of
msm-4.4 'commit c6b454e49daf ("msm: kgsl: Perform cache flush
on the pages obtained using get_user_pages()")'.

Change-Id: I2ba62d559c0eb399e2d7427345a183d1136aac9b
Signed-off-by: Vijayavardhan Vennapusa <quic_vvreddy@quicinc.com>