ARM: SoC: platform support for v4.2

Our SoC branch usually contains expanded support for new SoCs and
other core platform code. Some highlights from this round:

- sunxi: SMP support for A23 SoC
- socpga: big-endian support
- pxa: conversion to common clock framework
- bcm: SMP support for BCM63138
- imx: support new I.MX7D SoC
- zte: basic support for ZX296702 SoC

 Conflicts:
	arch/arm/mach-socfpga/core.h

Trivial remove/remove conflict with our cleanup branch.
Resolution: remove both sides
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