dsp: Add support to set clock drift

- Add support to adjust drift in audio interface
  clock source PLL.
- ADSP adjusts the source clock based on clk id. Add support
  in AFE driver to get clk id based on the AFE port.

Change-Id: I45ceb6579bb15e32541051e0ba936a2d903e4923
Signed-off-by: Surendar Karka <skarka@codeaurora.org>