Update boot progress interface with missing entry.

PCI Initialization is missing in the list of boot progress
stages, adding that to the boot progress interface yaml

Change-Id: I6fe563ac89a33b2fe06006bbe0ddf206d5d61de3
Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
diff --git a/xyz/openbmc_project/State/Boot/Progress.interface.yaml b/xyz/openbmc_project/State/Boot/Progress.interface.yaml
index 74ad6d8..2872098 100644
--- a/xyz/openbmc_project/State/Boot/Progress.interface.yaml
+++ b/xyz/openbmc_project/State/Boot/Progress.interface.yaml
@@ -22,6 +22,9 @@
        - name: SecondaryProcInit
          description: >
            Secondary Processor Initialization
+       - name: PCIInit
+         description: >
+           PCI resource initialization
        - name: OSStart
          description: >
            Starting Operating System.