Revert "acpuclock-msm7x30: remove ifdef for stock CPU voltages (just use one configuration)"

This reverts commit 8bfff6a8fce7ddb4e1712bcfa96989e1f52d6ac6.
Revert "acpuclock-msm7x30: Tweaked low end voltages a bit (lowered by ~25mV)"

This reverts commit 09ac7db22a47bd1db2bb9cbfe183238a99616748.