usb/penwell_otg: notify charger driver to drive VBUS in CLV

usb/penwell_otg: notify charger driver to drive VBUS in CLV

BZ: 28638

USB driver will notify charger driver to provide 5v on VBUS line
of USB OTG port in CLV, this is needed for USB Host function.

Change-Id: I151c254e95c89c9a615655911a8de6e7283ba18b
Signed-off-by: Wu, Hao <hao.wu@intel.com>
Reviewed-on: http://android.intel.com:8080/40194
Reviewed-by: Pallala, Ramakrishna <ramakrishna.pallala@intel.com>
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@intel.com>
Reviewed-by: Pandey, Raj <raj.pandey@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Reviewed-by: Meng, Zhe <zhe.meng@intel.com>
Tested-by: Meng, Zhe <zhe.meng@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>