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

[Jean-Christophe PLAGNIOL-VILLARD]

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.