G12B: DVFS: PWM regulators for CPUs are racy
In the default defconfig, PWM is built as a module (CONFIG_PWM_MESON=m), and with PWM as a module on the S922x (dual-cluster), the 2nd cluster sometimes does not ever find the pwm-regulator, so DVFS will not work for that cluster.
Suspect that there is a race due to deferred probe going on.
Temporary workaround: enable CONFIG_PWM_MESON=y for built-in PWM drivers