treesource: Fix dts output for phandles in middle of a sequence of ints

If we have a phandle in the middle of a sequence of numbers and
it is not bracketed (e.g. <0x1234 &phandle 0x5678>), the dts output will
be corrupted due to missing a space between the phandle value and the
following number.

Fixes: 8c59a97ce0 ("Fix missing labels when emitting dts format")
Cc: Grant Likely <grant.likely@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

treesource.c

@@ -239,10 +239,10 @@ static void write_propval(FILE *f, struct property *prop)
 		if (has_data_type_information(m)) {
 			emit_type = m->type;
 			fprintf(f, " %s", delim_start[emit_type]);
-		}
-
-		if (m->type == LABEL)
+		} else if (m->type == LABEL)
 			fprintf(f, " %s:", m->ref);
+		else if (m->offset)
+			fputc(' ', f);
 
 		if (emit_type == TYPE_NONE) {
 			assert(chunk_len == 0);