USB: OTG: Take wakelock when VBUS present

Enabled by default, can disable with:
   echo N > /sys/module/otg_wakelock/parameters/enabled

Change-Id: I34974624c52ae23490852b44c270d2f326cf6116
Signed-off-by: Todd Poynor <toddpoynor@google.com>
3 files changed