intel_scu_mip: update intel mip driver

intel_scu_mip: update intel mip driver

BZ: 28902

Base on current IPC driver framework, it is not suitable to put MIP
access code inside IPC bus driver. So we move it to a dedicated mip
driver, to make it more clear in logic.

Change-Id: I2b2392f586d5c5ef17b3498cdfe6e58e396e7ebf
Signed-off-by: Shijie Zhang <shijie.zhang@intel.com>
Reviewed-on: http://android.intel.com:8080/41379
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>