arm64: zynqmp: Move SoC sources to mach-zynqmp

Similar changes was done for Zynq in past and this patch just follow
this pattern to separate cpu code from SoC code.

Move arch/arm/cpu/armv8/zynqmp/* -> arch/arm/mach-zynqmp/*
And also fix references to these files.

Based on
"ARM: zynq: move SoC sources to mach-zynq"
(sha1: 0107f2403669f764ab726d0d404e35bb9447bbcc)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/mach-tegra/arm64-mmu.c b/arch/arm/mach-tegra/arm64-mmu.c
index 702fde1..d45b1fa 100644
--- a/arch/arm/mach-tegra/arm64-mmu.c
+++ b/arch/arm/mach-tegra/arm64-mmu.c
@@ -2,7 +2,7 @@
 /*
  * (C) Copyright 2014 - 2015 Xilinx, Inc.
  * Michal Simek <michal.simek@xilinx.com>
- * (This file derived from arch/arm/cpu/armv8/zynqmp/cpu.c)
+ * (This file derived from arch/arm/mach-zynqmp/cpu.c)
  *
  * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
  */