CheckPatch: Ignore MULTILINE_DEREFERENCE

To avoid long line in TF-M,
multiline-dereference might be used if needed.
This should not be complained by CheckPatch.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ie17eaec7e464c423937be56876aa4b41dd80a7bb
diff --git a/checkpatch/checkpatch.conf b/checkpatch/checkpatch.conf
index e40b913..0148d24 100644
--- a/checkpatch/checkpatch.conf
+++ b/checkpatch/checkpatch.conf
@@ -23,4 +23,5 @@
 --ignore QUOTED_WHITESPACE_BEFORE_NEWLINE
 --ignore FILE_PATH_CHANGES
 --ignore NEW_TYPEDEFS
+--ignore MULTILINE_DEREFERENCE
 --show-types