Revert "mach-msm/Makefile: include board-msm7x27a-regulator"

This reverts commit af49921300842047b800e91dda39c57dd10cf89e.
Revert "mach-msm/Makefile: include more 7x72 o files"

This reverts commit 822b86f018771b615c0b77a244f8d7d547fe3a93.