merrifield: initial platform code

merrifield: initial platform code

BZ: 25129

INTEL_MID_CPU_CHIP_TANGIER support added
mrfl soc platform specific code added
board-vp virtual platform specific code added
apb timers are deprecated in tangier

Change-Id: I5d5230e6ba78662e9d43bd11ba2d062ebc782255
Signed-off-by: Mark F. Brown <mark.f.brown@intel.com>
Reviewed-on: http://android.intel.com:8080/36583
Reviewed-by: Ng, Cheon-woei <cheon-woei.ng@intel.com>
Tested-by: Ng, Cheon-woei <cheon-woei.ng@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>