Revert "devfreq: Add Exynos 5420 MIF voltage control TNX Andreilux for this"

This reverts commit add458a77129f195448ebff10e4fb3663d8bfd1b.

Conflicts:
	drivers/devfreq/exynos5420_bus_mif.c
Revert "devfreq: Add Exynos 5420 INT voltage control TNX Andreilux for this"

This reverts commit 7ccd10974d51d9d765d96fae171d0d27f2f3ffa2.

Conflicts:
	drivers/devfreq/exynos5420_bus_int.c
sched.h fix