usb: port 7 patches from R2 to R3

usb: port 7 patches from R2 to R3

BZ: 19817

Patches are from the following BZs:
BZ: 16919
usb/penwell_otg: change all sysfs interface authority to 664
BZ: 11069
usb:langwell_udc:remove the invalid dqh->dqh_current write
BZ: 15754
usb/penwell_otg: retry after charger detection failure
BZ: 14339
usb:langwell_udc: remove controller reset in handle_usb_reset
BZ: 17449 17363 16799
usb: free pending requests before dma_pool_destroy
BZ: 18191
langwell_udc: Turn off the charger when device enters SE0, J, K test mode.
BZ: 18687
usb:gadget: clear string id of rndis and acm when unbinding

Change-Id: I124dfe21f78360a8bb5c00dd4a71ef7e4ac9cbb9
Signed-off-by: Li Wenji <wenji.li@intel.com>
Reviewed-on: http://android.intel.com:8080/31623
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@intel.com>
Reviewed-by: Yang, Fei <fei.yang@intel.com>
Tested-by: Sun, Jianhua <jianhua.sun@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>