intel_scu_ipcutil: add OSC_CLK setting ioctl support

intel_scu_ipcutil: add OSC_CLK setting ioctl support

BZ: 32771

This patch adds an OSC_CLK ioctl command for OSC_CLK control, which
makes OSC_CLK control, test and debug more easier.

Change-Id: I7e48106cd04633c5840bbb3e2b57fd3479a9e972
Signed-off-by: Shijie Zhang <shijie.zhang@intel.com>
Reviewed-on: http://android.intel.com:8080/44122
Reviewed-by: Du, Alek <alek.du@intel.com>
Tested-by: Wang, Zhifeng <zhifeng.wang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>