Revert "ARM: exynos: remove incorrect BSYM usage"

This reverts commit 3f8ba585b377ab93fe3071c94065350148e48362.
Revert "ARM: SoC: convert Exynos4 to SMP operations"

This reverts commit 8069ded4e44327bde0b78dfbc24f2958817a1c4e.
Revert "ARM: smp: Make SMP operations mandatory"

This reverts commit b08f49c9222d680c07080570ea102efaf98f59e3.