[U-Boot] Makefile cleanup and u-boot size reduction

Hi,

1)The following patchset will continue the move of conditional compile to Makefile and do some file location move

2) It will merge the current list implementation for common/device & co to linux list.h in order to reduce u-boot size. During test It did show the the patch will reduce u-boot size by 1KB min.

Best Regards, J.