Add image for Qidi X-7 Mainboard (#257)

* image for Qidi X-6 Mainboard

* Add images with proper proportions

* Add image for Qidi X-7 MAinboard

* Delete board-images/qidi-x7.png

* Correct dimensions

* Delete board-images/qidi-x7.png

* resize

* Add reusable configuration

Signed-off-by: Igor Pecovnik <igor@armbian.com>

---------

Signed-off-by: Igor Pecovnik <igor@armbian.com>
Co-authored-by: Igor Pecovnik <igor@armbian.com>

Author: Shadowrom2020

board-images/qidi-x7.png

@@ -235,4 +235,14 @@ boards:
     # The magic: reuse artifact set
     uses: "rpi4b"
     branch: "current"
-    file_extension: "img.xz"
+    file_extension: "img.xz"
+
+  - board_slug: "qidi-x7"
+    board_name: "Qidi X7"
+    board_vendor: "makerbase"
+    board_support: "csc"
+
+    # The magic: reuse artifact set
+    uses: "qidi-x6"
+    branch: "current"
+    file_extension: "img.xz"