aspeed: Add AST2600 platform support

Add low level platform initialization for the AST2600 SoC.
The 2-stage booting with U-Boot SPL are leveraged to support
different booting mode.

However, currently the patch supports only the booting from
memory-mapped SPI flash.

Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig
index 4f021ba..9a725f1 100644
--- a/arch/arm/mach-aspeed/Kconfig
+++ b/arch/arm/mach-aspeed/Kconfig
@@ -9,6 +9,11 @@
 config SYS_TEXT_BASE
 	default 0x00000000
 
+choice
+	prompt "Aspeed SoC select"
+	depends on ARCH_ASPEED
+	default ASPEED_AST2500
+
 config ASPEED_AST2500
 	bool "Support Aspeed AST2500 SoC"
 	depends on DM_RESET
@@ -18,6 +23,21 @@
 	  It is used as Board Management Controller on many server boards,
 	  which is enabled by support of LPC and eSPI peripherals.
 
+config ASPEED_AST2600
+	bool "Support Aspeed AST2600 SoC"
+	select CPU_V7A
+	select CPU_V7_HAS_NONSEC
+	select SYS_ARCH_TIMER
+	select SUPPORT_SPL
+	select ENABLE_ARM_SOC_BOOT0_HOOK
+	help
+	  The Aspeed AST2600 is a ARM-based SoC with Cortex-A7 CPU.
+	  It is used as Board Management Controller on many server boards,
+	  which is enabled by support of LPC and eSPI peripherals.
+
+endchoice
+
 source "arch/arm/mach-aspeed/ast2500/Kconfig"
+source "arch/arm/mach-aspeed/ast2600/Kconfig"
 
 endif