Revert "plat-omap: omap34xx: fix wrong cpu freq steps"

This reverts commit 6cc402062584baacc575fe6d51e7e34c2179fcd2.
Revert "Set correct voltages for 1ghz."

This reverts commit 162f270c82d671a1c8c75d612004d43590726a45.
Revert "Fix warnings, set 3 steps of freq. According to 4pda users, with 3steps telephony problem not exist"

This reverts commit b5735074304455f371d60c0d3f553b25649471c8.