Support for hekate to boot hos with emusd/emmc base emummc

bdk/storage/boot_storage.h

@@ -1,6 +1,7 @@
 #ifndef _BOOT_STORAGE_H
 #define _BOOT_STORAGE_H
 
+#include <libs/fatfs/ff.h>
 #include <utils/types.h>
 
 // check if boot1 (1mb), boot1, gpp, sd (in that order) have fat32 partition,
@@ -16,6 +17,8 @@ bool boot_storage_get_initialized();
 void *boot_storage_file_read(const char *path, u32 *fsize);
 int boot_storage_save_to_file(const void *buf, u32 size, const char *filename);
 
+FATFS *boot_storage_get_fs();
+
 u8 boot_storage_get_drive();
 
 #endif