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>
diff --git a/tools/binman/test/yaml/config.yaml b/tools/binman/test/yaml/config.yaml
index 5f799a6..c2be321 100644
--- a/tools/binman/test/yaml/config.yaml
+++ b/tools/binman/test/yaml/config.yaml
@@ -10,9 +10,9 @@
     b: 0
   arr: [0, 0, 0, 0]
   another-arr:
-    - #1
+    -  # 1
       c: 0
       d: 0
-    - #2
+    -  # 2
       c: 0
       d: 0