arm64: dts: ti: k3-am62l: support cpufreq scaling

arm64: dts: ti: k3-am62l: support cpufreq scaling

Enable CPUFreq support for AM62L SoC by adding the relevant OPP efuse table
syscon for speed grade detection.
Add the operating-points-v2 table with CPU frequency steps from 200MHz to
1.25GHz.
Specify the CPU clocks to reference the SCMI clock controller for frequency
scaling.

Signed-off-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Kendall Willis <k-willis@ti.com>
Link: https://patch.msgid.link/20260122-am62l-cpufreq-v5-1-65c50af71681@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>