Revert "ARM: SoC: convert MSM to SMP operations"

This reverts commit f14c542b4f761d2941d845dddaf4f4db9715cc12.
Revert "ARM: smp: remove wrapper functions"

This reverts commit 3e161697dad755f0e87e05a1ac7d931de0502d51.
Revert "ARM: smp: Make SMP operations mandatory"

This reverts commit 48388a131a5f4d7927e63b3dc085e12fd91ea9be.