Integrate meta-seconorth-mtk/fix-fw_env

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Commit: seco-ne/yocto/layers/meta-seconorth-mtk@6f5c0fb6

bsp:u-boot: Remove fv_env.config from u-boot recipe

Instead, it is configured via libubootenv in the distro layer,
the way it is done for nxp devices

default.xml

@@ -29,7 +29,7 @@
     <project name="meta-rity.git"                   revision="bc2393cf3c26a3db6da719a5e05d517c6fe01e6c"  remote="rity"         path="sources/meta-rity"                 />
     <project name="meta-rauc.git"                   revision="804386f04826ea7fe74a1b4e0a20991425c06d9c"  remote="rauc"         path="sources/meta-rauc"                 />
     <project name="layers/meta-seconorth-machine"   revision="64d4c8323e432ad897d4ca9b0a8d201f450f60c5"  remote="seco-ne"      path="sources/meta-seconorth-machine"    />
-    <project name="layers/meta-seconorth-mtk"       revision="ae2dce40aa85f62981e62497e93967aa35c9171a"  remote="seco-ne"      path="sources/meta-seconorth-mtk"        />
+    <project name="layers/meta-seconorth-mtk"       revision="6f5c0fb67e33cd499717ec1581052227bb0a9e1b"  remote="seco-ne"      path="sources/meta-seconorth-mtk"        />
     <project name="layers/meta-seconorth-distro"    revision="d9e97ceba0bb7f1e6eef839c4b2c1ec599d30112"  remote="seco-ne"      path="sources/meta-seconorth-distro"     />
     <project name="layers/meta-seconorth-nogplv3"   revision="2a0119b2a4cef6a1471c69b495ca1cdf60155949"  remote="seco-ne"      path="sources/meta-seconorth-nogplv3"    />
     <project name="config"                          revision="dd68e88c1db7561c6fa245e2f01a605fe8fdb68a"  remote="seco-ne"      path=".conf"                              >