Samsung mach/soc changes for v5.11 1. Do not use of_machine_is_compatible() in early CPU hotplug core. Full device tree walk causes "suspicious RCU usage" warnings. 2. Clear prefetch bits in default l2c_aux_val of L310 L2C - they are not needed. 3. Extend cpuidle support to P4 Note boards (Exynos4412).