CheckPatch: Update Check Rules

New type def should be allowed in TF-M.
It should not trigger an error.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I8e743d6e00ee4918fe16d8ec0844970e243a28c6
diff --git a/checkpatch/checkpatch.conf b/checkpatch/checkpatch.conf
index ade8ac6..e40b913 100644
--- a/checkpatch/checkpatch.conf
+++ b/checkpatch/checkpatch.conf
@@ -22,4 +22,5 @@
 --ignore ARRAY_SIZE
 --ignore QUOTED_WHITESPACE_BEFORE_NEWLINE
 --ignore FILE_PATH_CHANGES
+--ignore NEW_TYPEDEFS
 --show-types