USB: gadget: f_mtp: Adding Original f_mtp from android-msm-2.6.35 branch

Change-Id: Id0b577e145a2feb9779cb2bc5cf8485bb7ff25d5
Signed-off-by: RonGokhale <cips173@gmail.com>
USB: gadget: f_mtp: Add ioctl for sending events via the interrupt endpoint

Signed-off-by: Mike Lockwood <lockwood@android.com>