tools: binman: ti_board_cfg: Check for linting problems

Use yamllint for checking whether YAML configuration files are adhering
to default yamllint rules.

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
Suggested-by: Nishanth Menon <nm@ti.com>

tools/binman/test/yaml/config_phony.yaml

@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Test config
+#
+---
+
+main-branch :
+  obj :
+    a : 0x0
+    b: 0
+  arr: [0, 0, 0, 0]
+  another-arr:
+    -  # 1
+      c: 0
+      d: 0
+    -  # 2
+      c: 0
+      d: 0