Re: dtc: Move tree checking code to checks.c

So, like, the other day David Gibson mumbled:

This patch moves the dtc code for checking the device tree its
processing into a new checks.c.  The tree accessor functions from
livetree.c which the checks use are exported and added to dtc.h.

Another small step towards a flexible checking architecture.

Signed-off-by: David Gibson <redacted>

Applied.

jdl