This enables the DRAM frequency stats driver that can be useful for debugging issues with the PinePhone. This came up in a discussion in #pinephone on IRC where megi was helping a pmos user with idle power draw issues. This also enables the performance, powersave and userspace devfreq governors. Ref: https://github.com/torvalds/linux/commit/8bfd4858b4bba8fec14e4296cbac71aa55260d60 [ci:skip-build]: already built successfully in CI