PATCH scripts/kernel-doc

Fix a warning whinge from Perl introduced by "scripts: kernel-doc: parse next structs/unions"

Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.32), passed through in regex; marked by <-- HERE in m/({ <-- HERE [^\{\}]*})/ at ./scripts/kernel-doc line 1155.
Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.32), passed through in regex; marked by <-- HERE in m/({ <-- HERE )/ at ./scripts/kernel-doc line 1179.

Signed-off-by: Valdis Kletnieks <[e-mail]>
Reviewed-by: Mauro Carvalho Chehab <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>

scripts/kernel-doc

···
 	}
 
 	# Ignore other nested elements, like enums
-	$members =~ s/({[^\{\}]*})//g;
+	$members =~ s/(\{[^\{\}]*})//g;
 
 	create_parameterlist($members, ';', $file, $declaration_name);
 	check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
···
 			$declaration .= "\t" x $level;
 		}
 		$declaration .= "\t" . $clause . "\n";
-		$level++ if ($clause =~ m/({)/ && !($clause =~m/}/));
+		$level++ if ($clause =~ m/(\{)/ && !($clause =~m/}/));
 	}
 	output_declaration($declaration_name,
 			   'struct',