Integrate meta-seconorth-machine/speadspectrum-memtool_new

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Commit: seco-ne/yocto/layers/meta-seconorth-machine@58877c7f

spreadspectrum.py: Allow to use memtool for register access, install for mx8

seco-mx8: Fix override for spreadspectrum script

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Commit: seco-ne/yocto/layers/meta-seconorth-machine@d4bc4b5f

bsp:tools: Added memtool from imx-test

Added an extracted version of the memtool for reading/writing registers
of i.MX SoCs.

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="dd98526300937450d741c9b3403799632f417226"  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="2be00ac12a4ef9ae6ad5df9d0699dab31473d58d"  remote="seco-ne"      path="sources/meta-seconorth-machine"    />
+    <project name="layers/meta-seconorth-machine"   revision="58877c7f4d2d171aee8ecdcc2f676042f0a57f6f"  remote="seco-ne"      path="sources/meta-seconorth-machine"    />
     <project name="layers/meta-seconorth-distro"    revision="30a5251d62436f675ac8cfa08c53daae8f19e5ca"  remote="seco-ne"      path="sources/meta-seconorth-distro"     />
     <project name="layers/meta-seconorth-nogplv3"   revision="67ea1f30cb2714cdaf2735b9ac866fad8efd7355"  remote="seco-ne"      path="sources/meta-seconorth-nogplv3"    />
     <project name="config"                          revision="37e5ebd2403bb0ca0c20d1d40baac079baf49cdb"  remote="seco-ne"      path=".conf"                              >