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

This reverts commit bdf6ba9d6eef14cd881ce0b1ebca8d8f81f4bc1e.
Revert "ARM: smp: remove wrapper functions"

This reverts commit 20c0ee62206be71b957da5e44681f2142bcfa3cf.
Revert "ARM: smp: Make SMP operations mandatory"

This reverts commit 6e204cd56aff833e97cfa9080bdd19e412a79784.