ARM: Device-tree updates

Besides new bindings and additional descriptions of hardware blocks for
various SoCs and boards, the main new contents here is:

SoCs:
 - Intel Agilex (SoCFPGA)
 - NXP i.MX8MM (Quad Cortex-A53 with media/graphics focus)

New boards:
 - Allwinner:
  + RerVision H3-DVK (H3)
  + Oceanic 5205 5inMFD (H6)
  + Beelink GS2 (H6)
  + Orange Pi 3 (H6)
 - Rockchip:
  + Orange Pi RK3399
  + Nanopi NEO4
  + Veyron-Mighty Chromebook variant
 - Amlogic:
  + SEI Robotics SEI510
 - ST Micro:
  + stm32mp157a discovery1
  + stm32mp157c discovery2
 - NXP:
  + Eckelmann ci4x10 (i.MX6DL)
  + i.MX8MM EVK (i.MX8MM)
  + ZII i.MX7 RPU2 (i.MX7)
  + ZII SPB4 (VF610)
  + Zii Ultra (i.MX8M)
  + TQ TQMa7S (i.MX7Solo)
  + TQ TQMa7D (i.MX7Dual)
  + Kobo Aura (i.MX50)
  + Menlosystems M53 (i.MX53)j
 - Nvidia:
  + Jetson Nano (Tegra T210)
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Merge tag 'bitmain-soc-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/linux-bitmain into arm/dt

Bitmain SoC changes for v5.2:

- Added GPIO support for BM1880 SoC based on Designware APB GPIO
  controller
- Added GPIO line names for Sophon Edge board based on 96Boards CE
  specification for accessing GPIOs using line names from userspace
  tools like MRAA.
- Added pinctrl node for BM1880 SoC as a child node of sctrl syscon
  node.
- Added pinctrl support to UARTs exposed on the Sophon Edge board.

* tag 'bitmain-soc-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mani/linux-bitmain:
  arm64: dts: bitmain: Add UART pinctrl support for Sophon Edge
  arm64: dts: bitmain: Add pinctrl support for BM1880 SoC
  arm64: dts: bitmain: Add GPIO Line names for Sophon Edge board
  arm64: dts: bitmain: Add GPIO support for BM1880 SoC

Signed-off-by: Olof Johansson <olof@lixom.net>