binman: Add support for Intel FSP-S

This entry is used to hold an Intel FSP-S (Firmware Support Package
Silicon init) binary. Add support for this in binman.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/tools/binman/test/153_intel_fsp_s.dts b/tools/binman/test/153_intel_fsp_s.dts
new file mode 100644
index 0000000..579618a
--- /dev/null
+++ b/tools/binman/test/153_intel_fsp_s.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		size = <16>;
+
+		intel-fsp-s {
+			filename = "fsp_s.bin";
+		};
+	};
+};