soc: snapshot idle-v7.S

This is a snapshot of the idle-v7.S file as of msm-3.10
commit:

acdce027751d5a7488b283f0ce3111f873a5816d (Merge "defconfig: arm64:
Enable ONESHOT_SYNC for msm8994")

Change-Id: I6719969e41bbe30a5833f7e355e4dca6becc6a9c
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
[abhimany: resolved trivial merge conflict in Makefile]
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>