Integrate meta-seconorth-machine/add-u-boot-imx-recipe-copy

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Commit: seco-ne/yocto/layers/meta-seconorth-machine@bc9e1635

u-boot-imx: Add recipe for v2021.04 to keep it after meta-freescale upgrade

meta-frescale now uses a newer version of u-boot. We keep the old recipe
here until we also updated u-boot for our devices.

default.xml

@@ -21,7 +21,7 @@
     <project name="meta-qt5.git"                    revision="5b71df60e523423b9df6793de9387f87a149ac42"  remote="qt5-github"   path="sources/meta-qt5"                  />
     <project name="meta-freescale.git"              revision="2fb1ce365338126aad365012ebb913b3e4a9f1be"  remote="fslc"         path="sources/meta-freescale"            />
     <project name="meta-freescale-distro.git"       revision="fc15f5003043da23212596be7366ae2547c308ad"  remote="fslc"         path="sources/meta-freescale-distro"     />
-    <project name="layers/meta-seconorth-machine"   revision="f79fbee641050f139b5f45b6f22693f5ecb3d026"  remote="seco-ne"      path="sources/meta-seconorth-machine"    />
+    <project name="layers/meta-seconorth-machine"   revision="bc9e16355e462513947ea014862e17efd2ee5de4"  remote="seco-ne"      path="sources/meta-seconorth-machine"    />
     <project name="layers/meta-seconorth-distro"    revision="247db5f3c9fd971a51b7b7da60d16530c1c3d090"  remote="seco-ne"      path="sources/meta-seconorth-distro"     />
     <project name="layers/meta-seconorth-nogplv3"   revision="9ba8e4a89e3e0639c81a946a18294c66b161ad52"  remote="seco-ne"      path="sources/meta-seconorth-nogplv3"    />
     <project name="config"                          revision="39ac7a10e545d364d1f3bbf0db6920b99f0bf44a"  remote="seco-ne"      path=".conf"                              >