Add FSP 2.0 header files, these files are common for Skylake and Kabylake, name the folder as skykabylake to signify the same. Change-Id: I71b43a59c9a9b0adf1ee48285e4a72e24a13df2d Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com> Reviewed-on: https://review.coreboot.org/16050 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>