dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/fpga/intel-stratix10-soc-fpga-mgr.txt

@@ -0,0 +1,18 @@
+Intel Stratix10 SoC FPGA Manager
+
+Required properties:
+The fpga_mgr node has the following mandatory property, must be located under
+firmware/svc node.
+
+- compatible : should contain "intel,stratix10-soc-fpga-mgr" or
+	       "intel,agilex-soc-fpga-mgr"
+
+Example:
+
+	firmware {
+		svc {
+			fpga_mgr: fpga-mgr {
+				compatible = "intel,stratix10-soc-fpga-mgr";
+			};
+		};
+	};