exo2: implement the rest of cpu suspend (security checks TODO)

libraries/libexosphere/include/exosphere/pkg1/pkg1_se_key_slots.hpp

@@ -21,7 +21,8 @@ namespace ams::pkg1 {
     enum AesKeySlot {
         AesKeySlot_UserStart                = 0,
 
-        AesKeySlot_TzramSave                = 2,
+        AesKeySlot_TzramSaveKek             = 2,
+        AesKeySlot_TzramSaveKey             = 3,
 
         AesKeySlot_UserLast                 = 5,
         AesKeySlot_UserEnd                  = AesKeySlot_UserLast + 1,