Revert "OMAP3+: PM: DVFS: Scale dependent domains to existing OPP"

This reverts commit 934f7246365b071c2aa0fb3396570e57a412c40b.
Revert "PM: OPP: Add opp_find_volt_floor/ceil functions"

This reverts commit 909cb363bc5229595d9c3fe46b2dcb3fb286e3c3.