xtensa: add XTFPGA DTS

Add common XTFPGA parts as *.dtsi (base board, flash) and DTS for LX60
and for ML605.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
new file mode 100644
index 0000000..6f9c10d
--- /dev/null
+++ b/arch/xtensa/boot/dts/xtfpga-flash-4m.dtsi
@@ -0,0 +1,18 @@
+/ {
+	flash: flash@f8000000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "cfi-flash";
+		reg = <0xf8000000 0x00400000>;
+		bank-width = <2>;
+		device-width = <2>;
+		partition@0x0 {
+			label = "boot loader area";
+			reg = <0x00000000 0x003f0000>;
+		};
+		partition@0x3f0000 {
+			label = "boot environment";
+			reg = <0x003f0000 0x00010000>;
+		};
+        };
+};