arm: SC589-EZKIT initial support

Adds support for Analog Devices' SC589-EZKIT board. Includes:
- Board specific configs in mach-sc5xx/Kconfig
- Board-specific Kconfig and environment in board/adi/
- Memory configuration

Signed-off-by: Oliver Gaskell <Oliver.Gaskell@analog.com>

include/configs/sc589.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * (C) Copyright 2024 - Analog Devices, Inc.
+ */
+
+#ifndef __CONFIG_SC589_H
+#define __CONFIG_SC589_H
+
+/*
+ * Memory Settings
+ */
+#define MEM_MT41K128M16JT
+#define MEM_DMC0
+#define MEM_DMC1
+
+#define CFG_SYS_SDRAM_BASE	0xC2000000
+#define CFG_SYS_SDRAM_SIZE	0xe000000
+
+#endif