arm: SC573-EZKIT initial support

Adds support for Analog Devices' SC573-EZKIT board. Includes:
- SoC specific configs in mach-sc5xx/Kconfig
- Memory Map for SPL
- Necessary board-specific init functions
- Board-specific Kconfig and environment in board/adi/
- Memory configuration

Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
Co-developed-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>
Signed-off-by: Oliver Gaskell <Oliver.Gaskell@analog.com>
diff --git a/board/adi/sc573-ezkit/Kconfig b/board/adi/sc573-ezkit/Kconfig
new file mode 100644
index 0000000..328563c
--- /dev/null
+++ b/board/adi/sc573-ezkit/Kconfig
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# (C) Copyright 2024 - Analog Devices, Inc.
+
+if TARGET_SC573_EZKIT
+
+config SYS_BOARD
+	default "sc573-ezkit"
+
+config SYS_CONFIG_NAME
+	default "sc573-ezkit"
+
+config LDR_CPU
+	default "ADSP-SC573-0.0"
+
+config DEFAULT_DEVICE_TREE
+	default "sc573-ezkit"
+
+config ADI_IMAGE
+	default "tiny"
+
+config CUSTOM_SYS_INIT_SP_ADDR
+	default 0x8203f000
+
+# SPI Flash
+
+config SF_DEFAULT_BUS
+	default 2
+
+config SF_DEFAULT_CS
+	default 1
+
+config SF_DEFAULT_SPEED
+	default 10000000
+
+# Clocks
+
+config CGU0_DF_DIV
+	default 0
+
+config CGU0_VCO_MULT
+	default 18
+
+config CGU0_CCLK_DIV
+	default 1
+
+config CGU0_SCLK_DIV
+	default 2
+
+config CGU0_SCLK0_DIV
+	default 2
+
+config CGU0_SCLK1_DIV
+	default 2
+
+config CGU0_DCLK_DIV
+	default 2
+
+config CGU0_OCLK_DIV
+	default 3
+
+config CGU1_VCO_MULT
+	default 5
+
+config CGU1_DF_DIV
+	default 0
+
+config CGU1_CCLK_DIV
+	default 1
+
+config CGU1_SCLK_DIV
+	default 2
+
+config CGU1_SCLK0_DIV
+	default 2
+
+config CGU1_SCLK1_DIV
+	default 2
+
+config CGU1_DCLK_DIV
+	default 2
+
+config CGU1_OCLK_DIV
+	default 3
+
+config CDU0_CLKO0
+	default 1
+
+config CDU0_CLKO1
+	default 1
+
+config CDU0_CLKO2
+	default 1
+
+config CDU0_CLKO3
+	default 1
+
+config CDU0_CLKO4
+	default 1
+
+config CDU0_CLKO5
+	default 1
+
+config CDU0_CLKO6
+	default 1
+
+config CDU0_CLKO7
+	default 5
+
+config CDU0_CLKO8
+	default 1
+
+config CDU0_CLKO9
+	default 1
+
+endif