cpufreq: ti-cpufreq: Add opp support for am62p5 SoCs

The am62p5 is a variation of the am625 and the am62a7 SoC families. Add
the am62p5 to the list using the same cpufreq data as the rest of the
am62x extended family.

Signed-off-by: Bryan Brattlof <bb@ti.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>