Update tegra2_dvfs.c

Nominal voltages are too high for some devices which causes SOD in some devices... 3d and 2d speed set at 400 at 1300 mv.
Update tegra2_clocks.c

To do :  This speed is too high for our old Gtabs..
Update tegra2_clocks.c

Fill in proper values for 1704 to allow better OC on our OLD Gtabs :)