msm: clock-fsm9900: Add usb clock support

Add usb_otg clocks to all fsm9900 targets.

Change-Id: I2c964c7e413c9d9b0daf9960a5b9661b52816330
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>