drivers: soc: qcom: Add snapshot of idle-v7.S

This is a snapshot of the idle-v7.S file as of msm-3.10
commit acdce027751d5a ("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>
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>