arm: SC598-SOM-EZKIT initial support

Adds support for Analog Devices' SC598-SOM-EZKIT board. Includes:
- CONFIG options common to all SC5xx SoCs
- SoC specific configs in mach-sc5xx/Kconfig
- SPL config options in common/spl/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>
Co-developed-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Oliver Gaskell <Oliver.Gaskell@analog.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7296012..348f48b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1871,9 +1871,15 @@
 	select ADI_SC5XX_TIMER
 	select DM
 	select DM_SERIAL
+	select HAS_CUSTOM_SYS_INIT_SP_ADDR
 	select PANIC_HANG
 	select SPL
+	select SPL_BOOTROM_SUPPORT
 	select SPL_DM
+	select SPL_DM_SEQ_ALIAS
+	select SPL_LIBGENERIC_SUPPORT
+	select SPL_LIBCOMMON_SUPPORT
+	select SPL_SKIP_LOWLEVEL_INIT
 	select SUPPORT_SPL
 	select TIMER