Reboot to Hekate menu once without changing hekate_ipl.ini

Mariko: RTC REBOOT_REASON_MENU + PMIC reboot. Erista: patch in-memory
boot_cfg on valid Hekate payload and try common SD paths.

source/utils/utils.h

@@ -6,6 +6,10 @@ void MaskIn(char *mod, u32 bitstream, char mask);
 bool StrEndsWith(char *begin, char *end);
 void WaitFor(u32 ms);
 void RebootToPayloadOrRcm();
+void reboot_to_hekate_menu(void);
+bool hekate_reboot_available(void);
+int launch_payload_ex(char *path, bool force_hekate_menu);
+int launch_payload(char *path);
 
 #define FREE(x) free(x); x = NULL;
 char *ShowKeyboard(const char *toEdit, u8 alwaysRet);