dt-bindings: soc: mediatek: Add DVFSRC bindings for MT8183 and MT8195

dt-bindings: soc: mediatek: Add DVFSRC bindings for MT8183 and MT8195

Add bindings for the MediaTek Dynamic Voltage and Frequency Scaling
Resource Collector (DVFSRC), a hardware module used to collect all the
requests from both software and the various remote processors embedded
into the SoC and decide about a minimum operating voltage and a minimum
DRAM frequency to fulfill those requests in an effort to provide the
best achievable performance per watt.

This hardware IP is capable of transparently performing direct register
R/W on all of the DVFSRC-controlled regulators and SoC bandwidth knobs.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>