ARM: SoC fixes

A smallish batch of fixes, a little more than expected this late, but
all fixes are contained to their platforms and seem reasonably low risk:

- A somewhat large SMP fix for ux500 that still seemed warranted to include here
- OMAP DT fixes for pbias regulator specification that broke due to some DT
  reshuffling
- PCIe IRQ routing bugfix for i.MX
- Networking fixes for keystone
- Runtime PM for OMAP GPMC
- A couple of error path bug fixes for exynos
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