Add 6.1 kernel support from coolsnowwolf and Ansuel

root/target/linux/generic/hack-6.1/205-kconfig-exit.patch

@@ -0,0 +1,20 @@
+From 300d26562ce4dc427154cb247beb75db4b1f0774 Mon Sep 17 00:00:00 2001
+From: OpenWrt community <openwrt-devel@lists.openwrt.org>
+Date: Wed, 13 Jul 2022 13:29:57 +0200
+Subject: [PATCH] scripts/Kconfig: Kconfig exit
+
+---
+ scripts/kconfig/conf.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/scripts/kconfig/conf.c
++++ b/scripts/kconfig/conf.c
+@@ -432,6 +432,8 @@ static int conf_sym(struct menu *menu)
+ 				break;
+ 			continue;
+ 		case 0:
++			if (!sym_has_value(sym) && !tty_stdio && getenv("FAIL_ON_UNCONFIGURED"))
++				exit(1);
+ 			newval = oldval;
+ 			break;
+ 		case '?':