Revert "mach-exynos: cpufreq: Fix exynos_cpufreq_attr already exists"

This reverts commit 2f29ecb4aa1325f16e18a0d8f911bb4991be53cd.
Revert "mach-exynos: cpufreq: Show list of available frequencies"

This reverts commit 274cd708d70aa11f3537dfd6dc1273bb9188696e.
Update files