clk/qcom: apq8016: add support for USB_HS clocks

clk/qcom: apq8016: add support for USB_HS clocks

The newer "register map for simple gate clocks" support added for qcom
clocks is used. As a result gcc_apq8016 now has a mixture of the old and
new styles. I didn't (and still don't!) feel comfortable enough in this
area to update the existing code.

Signed-off-by: Sam Day <me@samcday.com>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>