add experimental imgtec ci20 support

target/config/Config.in.adk

@@ -18,7 +18,7 @@ config ADK_DL_DIR
 	  Use an absolute path.
 
 config ADK_EXPERIMENTAL
-	bool "Enable support for experimental features"
+	bool "Enable support for experimental features and targets"
 	default n
 	help
 	  This enables combinations of toolchain components or kernel

target/config/Config.in.kernel

@@ -81,3 +81,4 @@ config ADK_TARGET_KERNEL_MINICONFIG
 	default "sim-h8300h" if ADK_TARGET_SYSTEM_SIM_H8300H
 	default "qemu-m68k-mcf5208" if ADK_TARGET_QEMU_M68K_MCF5208
 	default "qemu-m68k-q800" if ADK_TARGET_QEMU_M68K_Q800
+	default "imgtec-ci20" if ADK_TARGET_SYSTEM_IMGTEC_CI20

target/mips/kernel/imgtec-ci20

@@ -0,0 +1,5 @@
+CONFIG_MIPS=y
+CONFIG_MACH_JZ4740=y
+CONFIG_CPU_MIPS32_R1=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y

target/mips/systems/imgtec-ci20

@@ -0,0 +1,12 @@
+config ADK_TARGET_SYSTEM_IMGTEC_CI20
+	bool "Imagination Creator CI20"
+	depends on ADK_EXPERIMENTAL
+	select ADK_CPU_MIPS32
+	select ADK_TARGET_LITTLE_ENDIAN
+	select ADK_TARGET_WITH_SERIAL
+	select ADK_TARGET_WITH_NAND
+	select ADK_TARGET_WITH_USB
+	select ADK_TARGET_WITH_SMP
+	help
+	  Support for Imagination Creator CI20.
+