msm: clock-9615: Update USB HSIC clock support

Do the following to provide complete USB HSIC clock
support:

1. Add a clock lookup entry for the USB HSIC clock.
2. Update frequency tables to match the latest plan.
3. Add a test vector for the USB HSIC clock.
4. Correct the n value to zero for the 480MHz rate
for the USB HSIC clock.

Change-Id: Ia6a56c25e52e40c26ae1bc10bac335e033e3cbd5
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>