util/kconfig: Uprev to Linux 5.14's kconfig

Upstream's changes have been minimal, to the perl script that we
don't use and a constness change, so I expect no harm. Still, this
keeps us in sync with the official version.

Change-Id: I5e5a2400bc3323938da4b946930e2ec119819672
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57880
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

util/kconfig/conf.c

@@ -680,7 +680,7 @@ static void check_conf(struct menu *menu)
 		check_conf(child);
 }
 
-static struct option long_opts[] = {
+static const struct option long_opts[] = {
 	{"help",          no_argument,       NULL,            'h'},
 	{"silent",        no_argument,       NULL,            's'},
 	{"oldaskconfig",  no_argument,       &input_mode_opt, oldaskconfig},

util/kconfig/streamline_config.pl

@@ -702,3 +702,5 @@ foreach my $module (keys(%modules)) {
 	print STDERR "\n";
     }
 }
+
+# vim: softtabstop=4