[PATCH] scripts/checkpatch: Fix a typo

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

When running checkpatch.pl on a commit adding a file without
SPDX tag we get:

  Undefined subroutine &main::WARNING called at ./scripts/checkpatch.pl line 1694.

The WARNING level is reported by the WARN() method. Fix the typo.

Fixes: fa4d79c64da ("scripts: mandate that new files have SPDX-License-Identifier")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
Possible candidate to apply on /master as buildfix
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 83b59fb4436..6ae9d7febee 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1691,8 +1691,8 @@ sub process {
 				  "'SPDX-License-Identifer'");
 			} else {
 			    # Other files MAY have SPDX license if appropriate
-			    WARNING("Does new file '$expect_spdx_file' need " .
-				    "'SPDX-License-Identifer'?");
+			    WARN("Does new file '$expect_spdx_file' need " .
+				 "'SPDX-License-Identifer'?");
 			}
 		    }
 		    $expect_spdx = 1;
-- 
2.47.1