board: Add support for Sielaff i.MX6 Solo board

The Sielaff i.MX6 Solo board is a control and HMI board for vending
machines. Add support for this board.

The devicetree files are taken from pending changes in the Linux
kernel that are available from linux-next and will likely be
part of Linux v6.9.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
diff --git a/include/configs/imx6dl-sielaff.h b/include/configs/imx6dl-sielaff.h
new file mode 100644
index 0000000..df07413
--- /dev/null
+++ b/include/configs/imx6dl-sielaff.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Kontron Electronics GmbH
+ */
+#ifndef __MX6SSIELAFF_CONFIG_H
+#define __MX6SSIELAFF_CONFIG_H
+
+#include <asm/arch/imx-regs.h>
+#include <linux/sizes.h>
+#include "mx6_common.h"
+
+#define CFG_MXC_UART_BASE		UART2_BASE
+
+#define PHYS_SDRAM_SIZE			SZ_512M
+#define PHYS_SDRAM			MMDC0_ARB_BASE_ADDR
+#define CFG_SYS_SDRAM_BASE		PHYS_SDRAM
+#define CFG_SYS_INIT_RAM_ADDR		IRAM_BASE_ADDR
+#define CFG_SYS_INIT_RAM_SIZE		IRAM_SIZE
+
+#define CFG_SYS_FSL_ESDHC_ADDR		USDHC3_BASE_ADDR
+#define CFG_SYS_FSL_USDHC_NUM		1
+
+#define CFG_SYS_NAND_BASE		0x40000000
+
+#endif /* __MX6SSIELAFF_CONFIG_H */