[U-Boot] ARMv8/FSL_LSCH3: SoC and board support

[Patch v2 1/5] Added 64-bit MMIO accessors for ARMv8 [Patch v2 2/5] ARMv8/FSL_LSCH3: Add FSL_LSCH3 SoC [Patch v2 3/5] ARMv8/ls2100a_emu: Add LS2100A emulator board support [Patch v2 4/5] armv8/fsl-lsch3: Add support to load and start MC [Patch v2 5/5] fsl-lsch3/ls2100a_emu: Enabled MC

I have sent 2/5 as individual patch before. To avoid confusion, let's start with v2.

Change since v1: 2/5 ARMv8/FSL_LSCH3: Add FSL_LSCH3 SoC Add L3 cache flushing Revised MMU table Re-create MMU in DDR after relocation Fix topology and clock registers

This set should be applied in order. I will create a bundle in patchwor to include floating patches to show the dependency.

York