SiFive Premier P550, Apple M2 Pro/Max/Ultra DTs & Other SoC Changes For Linux 6.18

The many SoC and platform/machine DeviceTree additions have been merged for the Linux 6.18 kernel! This includes finally having mainline support for the SiFive HiFive Premier P550 RISC-V development board and its EIC7700 SoC, Apple M2 Pro / Max / Ultra DeviceTrees added and associated Apple Mac system support, various new Snapdragon X1 laptops now being supported by the mainline kernel and much more...