EDAC: nuvoton: Add nuvoton NPCM memory controller driver

Support memory controller for Nuvoton NPCM SoC.

Addressed comments from:
 - Rob Herring : https://lkml.org/lkml/2022/2/25/1103
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/2/27/63
 - Rob Herring : https://lkml.org/lkml/2022/3/2/828
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/11/294
 - Jonathan Neuschäfer : https://lkml.org/lkml/2022/3/11/1167
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/11/293
 - Rob Herring : https://lkml.org/lkml/2022/3/11/575
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/11/305
 - Avi Fishman : https://lkml.org/lkml/2022/3/13/339
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/14/93
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/14/95
 - Krzysztof Kozlowski : https://lkml.org/lkml/2022/3/15/378
 - Boris Petkov : https://lkml.org/lkml/2022/3/17/561
 - Paul Menzel : https://lkml.org/lkml/2022/4/9/47
 - Paul Menzel : https://lkml.org/lkml/2022/4/11/182
 - Borislav Petkov : https://lkml.org/lkml/2022/4/8/871
 - Paul Menzel : https://lkml.org/lkml/2022/4/9/51
 - Paul Menzel : https://lkml.org/lkml/2022/4/9/65
 - Rob Herring : https://lkml.org/lkml/2022/4/21/681
 - Paul Menzel : https://lkml.org/lkml/2022/5/3/307
 - Paul Menzel : https://lkml.org/lkml/2022/5/3/304
 - Borislav Petkov : https://lkml.org/lkml/2022/5/3/343

Changes since version 9:
 - Add a necessary blank line in Kconfig for EDAC_NPCM.
 - Reflow for 75 characters per line in commit message of devicetree file.
 - Remove wrong tags in all the commit message.
 - Reorder content in commit message of NPCM memory controller driver.

Changes since version 8:
 - Add new line character at the end of file of yaml file

Changes since version 7:
 - Refactor npcm_edac.c.
 - Sort strings in npcm_edac.c.
 - Reflow code for 75 characters per line.
 - Summarize errors and warnings reported by kernel test robot.
 - Shorten name of values to make them become more readable in npcm_edac.c..
 - Put spaces between the * and the text in npcm_edac.c.

Changes since version 6:
 - Fix warnings in npcm_edac.c.
 - Add information reported by kernel test robot <lkp@intel.com>.

Changes since version 5:
 - Update commit message of dt-bindings: edac: nuvoton: add NPCM memory controller.
 
Changes since version 4:
 - Update filename in nuvoton,npcm-memory-controller.yaml.
 - Add COMPILE_TEST in Kconfig.
 - Fix errors in npcm_edac.c.
 - Remove unnecessary checking after of_match_device() and of_device_get_match_data().

Changes since version 3:
 - Rename npcm-edac.yaml as nuvoton,npcm-memory-controller.yaml.
 - Drop 'EDAC' in title of nuvoton,npcm-memory-controller.yaml.
 - Update compatible in nuvoton,npcm-memory-controller.yaml.

Changes since version 2:
 - Update description and compatible in npcm-edac.yaml.
 - Remove address-cells and size-cells in npcm-edac.yaml.
 - Reorder the items of examples in npcm-edac.yaml.
 - Reorder header file in driver.

Changes since version 1:
 - Add nuvoton,npcm750-memory-controller property in NPCM devicetree.
 - Add new property in edac binding document.
 - Add new driver for nuvoton NPCM memory controller.
Medad CChien (3):
  ARM: dts: nuvoton: Add memory controller node
  dt-bindings: edac: nuvoton: add NPCM memory controller
  EDAC: nuvoton: Add NPCM memory controller driver

 .../edac/nuvoton,npcm-memory-controller.yaml  |  61 ++
 arch/arm/boot/dts/nuvoton-common-npcm7xx.dtsi |   7 +
 drivers/edac/Kconfig                          |  10 +
 drivers/edac/Makefile                         |   1 +
 drivers/edac/npcm_edac.c                      | 680 ++++++++++++++++++
 5 files changed, 759 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/edac/nuvoton,npcm-memory-controller.yaml
 create mode 100644 drivers/edac/npcm_edac.c

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2.17.1