Revert "ARM: dts: dra7: Move to operating-points-v2 table"

This reverts commit f80bc97f.

The original commit updated the cpufreq operating points tables for
dra7xx but was merged before the driver making use of the node was
merged, which breaks the existing cpufreq implementation on the system,
so revert the patch until the ti-cpufreq driver is merged.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>