Update msm72k_otg.c

Add fix USB OTG mount (Thanks @MihailZenkov)
[[5v self powered USB OTG in (0.5mA or more) (Sorry google translator)]]


Run in adb shell (over network) or directly in android terminal:
echo host > /d/otg/mode

For return to normal (peripheral) mode:
echo peripheral > /d/otg/mode

If you want check current state:
cat /d/otg/info
Merge pull request #1 from IbizaHerrero/patch-1

Update msm72k_otg.c