msm: clock-8084: Add xo rate support for usb utmi clock

There is a use case of usb utmi clocks running at xo rate.
Therefore, add this support.

Change-Id: I8bb66e914bdf615c78ff89e4572c9fefcfefed5b
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>