hikey: Refactor configfs support to use init.hikey.usb.rc

It demands two patches from system/core:
commit a6c377b2f62175d6d5268c63885de3d882edbe2b
    init: usb: Add configfs commands for USB gadget
commit e18018639bd38e959118d16d567c7567bb88d80b
    init: usb: Add init scripts for configfs commands

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
3 files changed