dt-bindings: android: add entries of firmware and vbmeta

Add dt-bindings entries pertaining to android
firmware required for verified boot.

Change-Id: I67958c81bc4a1f1dbfe1affed57121188fad3c9c

bindings/firmware/qcom,scm.txt

@@ -28,6 +28,8 @@ Required properties:
  * "qcom,scm-sm8350"
  and:
  * "qcom,scm"
+ * "android,firmware" for firmware image
+ * "android,vbmeta" for setting system properties for verified boot.
 - clocks: Specifies clocks needed by the SCM interface, if any:
  * core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660" and
    "qcom,scm-msm8960"
@@ -49,3 +51,26 @@ Example for MSM8916:
 			clock-names = "core", "bus", "iface";
 		};
 	};
+
+Example for SM6150:
+
+firmware: firmware {
+		android {
+			compatible = "android,firmware";
+			vbmeta {
+				compatible = "android,vbmeta";
+				parts = "vbmeta,boot,system,vendor,dtbo";
+			};
+			fstab {
+				compatible = "android,fstab";
+				vendor {
+					compatible = "android,vendor";
+					dev = "/dev/block/platform/soc/1d84000.ufshc/by-name/vendor";
+					type = "ext4";
+					mnt_flags = "ro,barrier=1,discard";
+					fsmgr_flags = "wait,slotselect,avb";
+					status = "ok";
+				};
+			};
+		};
+	};