Integrate meta-seconorth-distro/add_vpu_libs

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Commit: seco-ne/yocto/layers/meta-seconorth-distro@1c4f4b7c

packagegroup:multimedia: Moved imxdma to i.MX8M only

The imxdma library doesn't compile on the i.MX6 right now.
Moved it to an i.MX8M only group.

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Commit: seco-ne/yocto/layers/meta-seconorth-distro@5bbf5cff

packagegroup:multimedia: Added dummy group for extra

The dynamic layer override for our i.MX8 devices has an extra
packagegroup. For the i.MX6 devices, this group isn't available
and leads to an error during the Yocto build.
Added a dummy group to prevent this error from happening.

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Commit: seco-ne/yocto/layers/meta-seconorth-distro@bf0addcb

packagegroup:multimedia: Added VPU test libraries

The imxdmabuffer and imxvpuapi libraries have been added.
They can be used to test the VPU functionality and the allocation
of memory blocks.

BCS 746-000905

default.xml

@@ -22,7 +22,7 @@
     <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-distro"    revision="1c8d1ebb45936d35d64d696cfd118f623fd9ba6c"  remote="seco-ne"      path="sources/meta-seconorth-distro"     />
+    <project name="layers/meta-seconorth-distro"    revision="1c4f4b7ce02476dcf7d89a4e08efb0d9c5012f29"  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"                              >
         <linkfile dest="setup-environment" src="setup-environment" />