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

exosphere/src/gcm.h

@@ -8,6 +8,14 @@ size_t gcm_decrypt_key(void *dst, size_t dst_size,
                        const void *src, size_t src_size,
                        const void *sealed_kek, size_t kek_size,
                        const void *wrapped_key, size_t key_size,
-                       unsigned int usecase, bool is_personalized);
+                       unsigned int usecase, bool is_personalized, 
+                       uint8_t *out_deviceid_high);
+
+
+void gcm_encrypt_key(void *dst, size_t dst_size,
+                       const void *src, size_t src_size,
+                       const void *sealed_kek, size_t kek_size,
+                       const void *wrapped_key, size_t key_size,
+                       unsigned int usecase, uint64_t deviceid_high);
 
 #endif