PEL: Fixes for State.Boot.Raw Value updates

The first entry in the std::tuple of the Value property, which is used
to hold the 8 character SRC refcode, changed from a uint64_t to a
std::vector<uint8_t>.  Make the necessary updates.

Tested:

Create a PEL with a severity value of 0x51 = critical system
termination.  It has the refcode sent to this Value property:

```
$ busctl get-property xyz.openbmc_project.State.Boot.Raw \
/xyz/openbmc_project/state/boot/raw0 \
xyz.openbmc_project.State.Boot.Raw Value
(ayay)
8 49 49 48 48 50 54 48 50
^^ this is the correct 8 byte 11002602 refcode

and the rest is the 72 byte progress SRC:
72 2 9 0 9 0 0 0 188 0 0 0 85 46 45 0
16 0 0 0 0 32 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 49 49 48 48 50 54 48
50 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32
```

And now create another PEL, and this progress SRC should be in the hex
words:
```
"Reference Code":           "BD8D3601",
"Hex Word 2":               "00000055",
"Hex Word 3":               "2E2D0010",
"Hex Word 4":               "11002602", <-------------------
"Hex Word 5":               "00000000",
"Hex Word 6":               "00000000",
"Hex Word 7":               "00000000",
"Hex Word 8":               "00000000",
"Hex Word 9":               "00000000",
```

Change-Id: I8050eaf3e372b724fa41dc358633d4b3d29fc782
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/extensions/openpower-pels/data_interface.hpp b/extensions/openpower-pels/data_interface.hpp
index d15a580..0e322fa 100644
--- a/extensions/openpower-pels/data_interface.hpp
+++ b/extensions/openpower-pels/data_interface.hpp
@@ -473,7 +473,7 @@
      * @param[in] srcStruct - Full SRC base structure
      */
     virtual void createProgressSRC(
-        const uint64_t& priSRC,
+        const std::vector<uint8_t>& priSRC,
         const std::vector<uint8_t>& srcStruct) const = 0;
 
     /**
@@ -887,7 +887,7 @@
      * @param[in] srcStruct - Full SRC base structure
      */
     void createProgressSRC(
-        const uint64_t& priSRC,
+        const std::vector<uint8_t>& priSRC,
         const std::vector<uint8_t>& srcStruct) const override;
 
     /**