boot-progress: introduce new setup state

Some OpenBMC systems have an option to boot into a setup state where the
user can interact with the host via a KVM or virtual tty interface.
Commonly this is the BIOS setup menu on a computer system.

The PLDM "Boot Progress" sensor in DSP0249_1.0.0.pdf defines this state
as "7 –  User-Initiated System Setup "

The DMTF also has a "SetupEntered" coming for their BootProgressTypes
enumeration. This will be released as a part of the 2021.1 release.

This new D-Bus enum value will be how we connect the host PLDM sensor
with the Redfish BootProgress API.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Ic3c68ddc16e4afeb782c6bfdabea62b03a3eee32
diff --git a/xyz/openbmc_project/State/Boot/Progress.interface.yaml b/xyz/openbmc_project/State/Boot/Progress.interface.yaml
index 28c72ee..45699b1 100644
--- a/xyz/openbmc_project/State/Boot/Progress.interface.yaml
+++ b/xyz/openbmc_project/State/Boot/Progress.interface.yaml
@@ -50,6 +50,9 @@
        - name: OSRunning
          description: >
            Operating System up and running
+       - name: SystemSetup
+         description: >
+           System firmware has entered a setup state
        - name: MotherboardInit
          description: >
            Motherboard/Basebord Initialization.