checkpatch: Add argument to skip committer signoff check.

Introduce --skip-committer-signoff arg that can be used internally
by groups using gerrit for code reviews and gerrit maintainers could
do the rebase instead of the author or push upstream commits to be
merged through gerrit.

Signed-off-by: Salem Sol <salems@nvidia.com>
Acked-by: Roi Dayan <roid@nvidia.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Simon Horman <horms@ovn.org>

utilities/checkpatch.py

@@ -189,6 +189,7 @@ def reset_counters():
 skip_gerrit_change_id_check = False
 skip_block_whitespace_check = False
 skip_signoff_check = False
+skip_committer_signoff_check = False
 
 # Don't enforce character limit on files that include these characters in their
 # name, as they may have legitimate reasons to have longer lines.
@@ -920,7 +921,8 @@ def ovs_checkpatch_parse(text, filename, author=None, committer=None):
                             break
                     if (committer
                         and author != committer
-                        and committer not in signatures):
+                        and committer not in signatures
+                        and not skip_committer_signoff_check):
                         print_error("Committer %s needs to sign off."
                                     % committer)
 
@@ -1038,7 +1040,8 @@ def usage():
 -S|--spellcheck                Check C comments and commit-message for possible
                                spelling mistakes
 -t|--skip-trailing-whitespace  Skips the trailing whitespace test
-   --skip-gerrit-change-id     Skips the gerrit change id test"""
+   --skip-gerrit-change-id     Skips the gerrit change id test
+   --skip-committer-signoff    Skips the committer sign-off test"""
           % sys.argv[0])
 
 
@@ -1109,6 +1112,7 @@ def partition(pred, iterable):
                                        "skip-signoff-lines",
                                        "skip-trailing-whitespace",
                                        "skip-gerrit-change-id",
+                                       "skip-committer-signoff",
                                        "spellcheck",
                                        "quiet"])
     except:
@@ -1129,6 +1133,8 @@ def partition(pred, iterable):
             skip_trailing_whitespace_check = True
         elif o in ("--skip-gerrit-change-id"):
             skip_gerrit_change_id_check = True
+        elif o in ("--skip-committer-signoff"):
+            skip_committer_signoff_check = True
         elif o in ("-f", "--check-file"):
             checking_file = True
         elif o in ("-S", "--spellcheck"):