Integrate 5.x SMC API changes, add 4.x specific setup, implement target firmware selection

exosphere/src/configitem.h

@@ -19,6 +19,9 @@ typedef enum {
     CONFIGITEM_KERNELMEMORYCONFIGURATION = 12,
     CONFIGITEM_BATTERYPROFILE = 13,
     CONFIGITEM_ODM4BIT10_4X = 14,
+    CONFIGITEM_NEWHARDWARETYPE_5X = 15,
+    CONFIGITEM_NEWKEYGENERATION_5X = 16,
+    CONFIGITEM_PACKAGE2HASH_5X = 17
 } ConfigItem;
 
 uint32_t configitem_set(ConfigItem item, uint64_t value);