devtools: add git check exception for OCTEON TX

The 'TX' in OCTEON TX would cause a warning.
Adding an exception for that.

OCTEON TX is a registered product under Cavium

Signed-off-by: Anoob Joseph <anoob.joseph@caviumnetworks.com>

devtools/check-git-log.sh

@@ -116,6 +116,8 @@ bad=$(echo "$headlines" | grep -E --color=always \
 	-e ':.*\<[Vv]lan\>' \
 	-e ':.*\<vdpa\>' \
 	-e ':.*\<vsi\>' \
+	| grep \
+	-v ':.*\<OCTEON\ TX\>' \
 	| sed 's,^,\t,')
 [ -z "$bad" ] || printf "Wrong headline lowercase:\n$bad\n"