xtensa: add support for the 'xtfpga' evaluation board

The 'xtfpga' board is actually a set of FPGA evaluation boards that
can be configured to run an Xtensa processor.

 - Avnet Xilinx LX60
 - Avnet Xilinx LX110
 - Avnet Xilinx LX200
 - Xilinx ML605
 - Xilinx KC705

These boards share the same components (open-ethernet, ns16550 serial,
lcd display, flash, etc.).

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/cadence/xtfpga/Kconfig b/board/cadence/xtfpga/Kconfig
new file mode 100644
index 0000000..69296be
--- /dev/null
+++ b/board/cadence/xtfpga/Kconfig
@@ -0,0 +1,39 @@
+if TARGET_XTFPGA
+
+choice
+	prompt "XTFPGA board type select"
+
+config XTFPGA_LX60
+	bool "Support Avnet LX60"
+config XTFPGA_LX110
+	bool "Support Avnet LX110"
+config XTFPGA_LX200
+	bool "Support Avnet LX200"
+config XTFPGA_ML605
+	bool "Support Xilinx ML605"
+config XTFPGA_KC705
+	bool "Support Xilinx KC705"
+
+endchoice
+
+config SYS_BOARD
+	string
+	default "xtfpga"
+
+config SYS_VENDOR
+	string
+	default "cadence"
+
+config SYS_CONFIG_NAME
+	string
+	default "xtfpga"
+
+config BOARD_SDRAM_SIZE
+	hex
+	default 0x04000000 if XTFPGA_LX60
+	default 0x03000000 if XTFPGA_LX110
+	default 0x06000000 if XTFPGA_LX200
+	default 0x18000000 if XTFPGA_ML605
+	default 0x38000000 if XTFPGA_KC705
+
+endif