https://bugzilla.tianocore.org/show_bug.cgi?id=4502 Update SplitFspBin.py to support child FV in FSP binary. Without the patch, the tool won't be able to rebase the images in child FV in FSP binary. Cc: Chasel Chiu <chasel.chiu@intel.com> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Ashraf Ali S <ashraf.ali.s@intel.com> Cc: Chinni B Duggapu <chinni.b.duggapu@intel.com> Cc: Ray Han Lim Ng <ray.han.lim.ng@intel.com> Cc: Susovan Mohapatra <susovan.mohapatra@intel.com> Signed-off-by: Ted Kuo <ted.kuo@intel.com> Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>