SecurityPkg: Add option to reset secure boot keys.

This commit add option which allows reset content of Secure Boot
keys and databases to default variables.

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
Reviewed-by: Sunny Wang <sunny.wang@arm.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Pete Batard <pete@akeo.ie>
Tested-by: Pete Batard <pete@akeo.ie> # on Raspberry Pi 4

SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigNvData.h

@@ -54,6 +54,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 
 #define KEY_VALUE_FROM_DBX_TO_LIST_FORM       0x100f
 
+#define KEY_SECURE_BOOT_RESET_TO_DEFAULT      0x1010
+
 #define KEY_SECURE_BOOT_OPTION                0x1100
 #define KEY_SECURE_BOOT_PK_OPTION             0x1101
 #define KEY_SECURE_BOOT_KEK_OPTION            0x1102