Merge branch 'loongson1-mac'

Keguang Zhang says:

====================
Move Loongson1 MAC arch-code to the driver dir

In order to convert Loongson1 MAC platform devices to the devicetree
nodes, Loongson1 MAC arch-code should be moved to the driver dir.
Add dt-binding document and update MAINTAINERS file accordingly.

In other words, this patchset is a preparation for converting
Loongson1 platform devices to devicetree.

Changelog
V4 -> V5: Replace stmmac_probe_config_dt() with devm_stmmac_probe_config_dt()
          Replace stmmac_pltfr_probe() with devm_stmmac_pltfr_probe()
          Squash patch 4 into patch 2 and 3
V3 -> V4: Add Acked-by tag from Krzysztof Kozlowski
          Add "|" to description part
          Amend "phy-mode" property
          Drop ls1x_dwmac_syscon definition and its instances
          Drop three redundant fields from the ls1x_dwmac structure
          Drop the ls1x_dwmac_init() method.
          Update the dt-binding document entry of Loongson1 Ethernet
          Some minor improvements
V2 -> V3: Split the DT-schema file into loongson,ls1b-gmac.yaml
          and loongson,ls1c-emac.yaml (suggested by Serge Semin)
          Change the compatibles to loongson,ls1b-gmac and loongson,ls1c-emac
          Rename loongson,dwmac-syscon to loongson,ls1-syscon
          Amend the title
          Add description
          Add Reviewed-by tag from Krzysztof Kozlowski
          Change compatibles back to loongson,ls1b-syscon
          and loongson,ls1c-syscon
          Determine the device ID by physical
          base address(suggested by Serge Semin)
          Use regmap instead of regmap fields
          Use syscon_regmap_lookup_by_phandle()
          Some minor fixes
          Update the entries of MAINTAINERS
V1 -> V2: Leave the Ethernet platform data for now
          Make the syscon compatibles more specific
          Fix "clock-names" and "interrupt-names" property
          Rename the syscon property to "loongson,dwmac-syscon"
          Drop "phy-handle" and "phy-mode" requirement
          Revert adding loongson,ls1b-dwmac/loongson,ls1c-dwmac
          to snps,dwmac.yaml
          Fix the build errors due to CONFIG_OF being unset
          Change struct reg_field definitions to const
          Rename the syscon property to "loongson,dwmac-syscon"
          Add MII PHY mode for LS1C
          Improve the commit message
====================

Signed-off-by: David S. Miller <davem@davemloft.net>