[PATCH] Remove support for the legacy DTS source file format.

[Jon Loeliger]

Now that all in-kernel-tree DTS files are properly /dts-v1/,
remove direct support for the older, un-numbered DTS
source file format.

Convert existing tests to /dts-v1/ and remove support
for the conversion tests themselves.

For now, though, the conversion tool still exists.

Signed-off-by: Jon Loeliger <jdl at freescale.com>
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I've decided to apply this patch.  It may not be popular,
but we're going to move forward here.   Several folks at
Freescale agree with me here.