Revert: "tegra3: scale cpu_g from 102MHz to 1500MHz."

(original commit by franciscofranco for grouper 3.1.10)

Change-Id: Id8171ea3eeb140de9eb6442e9b5eb535232e12e5
Original-CId: I4f861f7507d5a0cd263d2b902bd99d5e5e7d50c6