rtsm linux: add minimal linux configuration with submodule
Loadlinux.c : the function that setups atags move loadlinux.c
1. loadlinux : move all the private macros and functions into loadlinux
2. add prefix - to private variable.
3. linux-rtsm submodule commit point to 7d1f9ae
Merge pull request #68 from in1004kyu/v1-linux

rtsm linux: add minimal linux configuration with submodule