msm: otg: Add vbus sensing support

VBUS is not routed to USB PHY on recent platforms and USB controller
must see VBUS in order to pull-up DP when setting RS bit. Hence
configure USB PHY and LINK registers sense vbus and enable manual
pullup on D+ line.

Change-Id: I140f6de958fb18731dbedded40226192cd3a12f8
Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
6 files changed