dtc: Convert "name" property checking to new infrastructure

This patch removes the old-style checking code for the "name" property
- i.e. verifying that the "name" property, if present, matches the
node name.  It replaces it with a pair of more-or-less equivalent
checks in the new checking framework.

This also promotes this check to a "structural" check, or at least an
error-rather-than-warning test, since the structural/semantic
distinction doesn't really apply in the new framework.

A testcase for the check is also added.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/run_tests.sh

@@ -162,6 +162,7 @@ dtc_tests () {
     run_test dtc-checkfails.sh -I dts -O dtb minusone-phandle.dts
     run_test dtc-checkfails.sh -I dts -O dtb nonexist-node-ref.dts
     run_test dtc-checkfails.sh -I dts -O dtb nonexist-label-ref.dts
+    run_test dtc-checkfails.sh -I dts -O dtb bad-name-property.dts
 }
 
 while getopts "vt:m" ARG ; do