util/kconfig: Uprev to Linux 6.1's kconfig

This also cleans up our patch queue.

TEST=`util/abuild/abuild -C` output (config.h and config.build) remains
the same

Change-Id: I79159130ba3515ede59e9fb9fbf087e2ed76257a
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79203
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

util/kconfig/conf.c

@@ -553,7 +553,7 @@ static int conf_choice(struct menu *menu)
 			print_help(child);
 			continue;
 		}
-		sym_set_choice_value(sym, child->sym);
+		sym_set_tristate_value(child->sym, yes);
 		for (child = child->list; child; child = child->next) {
 			indent += 2;
 			conf(child);