scripts/dtc: Update to upstream version v1.4.6-21-g84e414b0b5bc

This adds the following commits from upstream:

84e414b0b5bc tests: Add a test case for the omit-if-no-ref keyword
4038fd90056e dtc: add ability to make nodes conditional on them being referenced
e1f139ea4900 checks: drop warning for missing PCI bridge bus-range
f4eba68d89ee checks: Print duplicate node name instead of parent name
46df1fb1b211 .travis.yml: Run valgrind checks via Travis
14a3002a1aee tests: Update valgrind suppressions for sw_tree1
02c5fe9debc0 tests: Remove valgrind error from tests/get_path
df536831d02c checks: add graph binding checks
2347c96edcbe checks: add a check for duplicate unit-addresses of child nodes
8f1b35f88395 Correct overlay syntactic sugar for generating target-path fragments
afbddcd418fb Suppress warnings on overlay fragments
119e27300359 Improve tests for dtc overlay generation

Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
index fd825ebba69c..615b7ec6588f 100644
--- a/scripts/dtc/dtc-lexer.l
+++ b/scripts/dtc/dtc-lexer.l
@@ -153,6 +153,13 @@ static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
                         return DT_DEL_NODE;
                 }
 
+<*>"/omit-if-no-ref/"   {
+                        DPRINT("Keyword: /omit-if-no-ref/\n");
+                        DPRINT("<PROPNODENAME>\n");
+                        BEGIN(PROPNODENAME);
+                        return DT_OMIT_NO_REF;
+                }
+
 <*>{LABEL}:     {
                         DPRINT("Label: %s\n", yytext);
                         yylval.labelref = xstrdup(yytext);