Fix reference to undefined property on Firmware page

Firmware page template is referencing a property that doesn't exist
on the component instance.
currentFirmwareVersion should be changed to systemFirmwareVersion.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I9e46fead4644ac432e30e67f18b9d9d60e22d555
diff --git a/src/views/Configuration/Firmware/Firmware.vue b/src/views/Configuration/Firmware/Firmware.vue
index 94070b7..cfdc0a3 100644
--- a/src/views/Configuration/Firmware/Firmware.vue
+++ b/src/views/Configuration/Firmware/Firmware.vue
@@ -194,7 +194,7 @@
     <!-- Modals -->
     <modal-upload @ok="uploadFirmware" />
     <modal-reboot-backup
-      :current="currentFirmwareVersion"
+      :current="systemFirmwareVersion"
       :backup="backupFirmwareVersion"
       @ok="rebootFromBackup"
     />