arm: msm: drop the upstream kernel mach-msm code

In accordance with upstream plans drop all files under
mach-msm. This is done as the upstream community is
moving all code to mach-qcom and we will maintain all
internal code within mach-msm.

Change-Id: Ic3f202307ab37d749b57e71119990de7088ee78a
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>