msm: platsmp: snapshot of the smp ops

Add smp related files like platsmp, headsmp and
hotplug. Copied from the below caf link
https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.18/


tree/arch/arm/mach-msm?h=caf/3.10/msm-3.10
&id=5724b421fc2db7413048fe5b18135d481d68597a

Change-Id: I20560df247c9adacdbb92711fd0945d0ae9c7e08
Signed-off-by: Venkatesh Yadav Abbarapu <vabbar@codeaurora.org>
Git-commit: 0fe30edd5c4a0a3a3506e565946ab13f716cadda
Git-repo: https://source.codeaurora.org/quic/la/kernel/msm-4.9


[sundvi@codeaurora.org: using only hotplug source change]
Signed-off-by: Sundara Vinayagam <sundvi@codeaurora.org>
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>