utils: ipc: extract-docs: Work around reuse tool problem

The reuse tool fails to lint the extract-docs.py file because it
considers the 'SPDX-License-Identifier' string in a regex as a malformed
license identifier. Work around the issue by adding parentheses in the
regular expression, which doesn't affect the behaviour of the regex
matching but prevents the reuse tool from seeing the line.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>

utils/codegen/ipc/extract-docs.py

@@ -12,7 +12,7 @@ import sys
 
 regex_block_start = re.compile(r'^/\*\*$')
 regex_block_end = re.compile(r'^ \*/$')
-regex_spdx = re.compile(r'^/\* SPDX-License-Identifier: .* \*/$')
+regex_spdx = re.compile(r'^/\* (SPDX)-License-Identifier: .* \*/$')
 
 
 def main(argv):