c8817d: Revert changes in init.qcom.usb.rc

For less conflects during a CAF merge.

Change-Id: Id41dac2beefd9243c075a018e3aecb942b6e23a0
c8817d: actually kill UMS

Change-Id: I0e3fd02248fb5aadb2977e6acaa3533707c47408