Populate the Type property in Item.Drive interface

By populating this property, bmcweb can populate the "MediaType"
property in the Drive schema.

Tested:
$ busctl get-property xyz.openbmc_project.eStoraged \
  /xyz/openbmc_project/inventory/storage/mmcblk0 \
  xyz.openbmc_project.Inventory.Item.Drive Type
s "xyz.openbmc_project.Inventory.Item.Drive.DriveType.SSD"

$ curl http://localhost:80/redfish/v1/Chassis/DCSCM/Drives/mmcblk0
{
...
  "MediaType": "SSD",
...
}

Signed-off-by: John Wedig <johnwedig@google.com>
Change-Id: I2cb6c7d3ec3b49e8d666da940d873f1117a0aa85
diff --git a/include/util.hpp b/include/util.hpp
index 8f5a0ff..7cc778a 100644
--- a/include/util.hpp
+++ b/include/util.hpp
@@ -18,14 +18,16 @@
     std::string locationCode;
     uint64_t eraseMaxGeometry;
     uint64_t eraseMinGeometry;
+    std::string driveType;
 
     DeviceInfo(std::filesystem::path& deviceFile,
                std::filesystem::path& sysfsDir, std::string& luksName,
                std::string& locationCode, uint64_t eraseMaxGeometry,
-               uint64_t eraseMinGeometry) :
+               uint64_t eraseMinGeometry, std::string& driveType) :
         deviceFile(deviceFile),
         sysfsDir(sysfsDir), luksName(luksName), locationCode(locationCode),
-        eraseMaxGeometry(eraseMaxGeometry), eraseMinGeometry(eraseMinGeometry)
+        eraseMaxGeometry(eraseMaxGeometry), eraseMinGeometry(eraseMinGeometry),
+        driveType(driveType)
     {}
 };