Add d-bus interface for BIOS boot type (EFI/Legacy)

The interface is addded to support IPMI boot type field of a
"Get System Boot Options" сommand.

[1] - BIOS boot type (for BIOS that support both legacy and EFI boots)
  0b = "PC compatible" boot (legacy)
  1b = Extensible Firmware Interface Boot (EFI)

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: Ia31918ee941f4dbed5f27c4f5cbfb62c2b259d6e
diff --git a/xyz/openbmc_project/Control/Boot/Type.interface.yaml b/xyz/openbmc_project/Control/Boot/Type.interface.yaml
new file mode 100644
index 0000000..21063be
--- /dev/null
+++ b/xyz/openbmc_project/Control/Boot/Type.interface.yaml
@@ -0,0 +1,21 @@
+description: >
+    Implement to designate the type of a boot image.
+
+properties:
+    - name: BootType
+      type: enum[self.Types]
+      description: >
+          The desired boot image type.
+      default: EFI
+
+enumerations:
+    - name: Types
+      description: >
+        Possible types of a boot image.
+      values:
+        - name: Legacy
+          description: >
+            PC compatible boot.
+        - name: EFI
+          description: >
+            Extensible Firmware Interface Boot.