[PATCHv4 1/3] dts: socfpga: Add bindings for Altera SoC SDRAM[PATCHv4 2/3] dts: socfpga: Add bindings for Altera SoC SDRAM EDAC[PATCHv4 3/3] edac: altera: Add EDAC support for Altera SoC SDRAM Controller