Add support for file/partition based emummc on emmc,

Add support for emuSD

fusee/program/source/fatfs/ff.h

@@ -172,8 +172,7 @@ typedef struct {
     LBA_t   bitbase;        /* Allocation bitmap base sector */
 #endif
     LBA_t   winsect;        /* Current sector appearing in the win[] */
-    BYTE    pad[4];
-    BYTE    win[FF_MAX_SS]; /* Disk access window for Directory, FAT (and file data at tiny cfg) */
+    __attribute__((aligned(8))) BYTE    win[FF_MAX_SS]; /* Disk access window for Directory, FAT (and file data at tiny cfg) */
 } FATFS;
 
 
@@ -218,7 +217,7 @@ typedef struct {
     DWORD*  cltbl;          /* Pointer to the cluster link map table (nulled on open, set by application) */
 #endif
 #if !FF_FS_TINY
-    BYTE    buf[FF_MAX_SS]; /* File private data read/write window */
+    __attribute__((aligned(8))) BYTE    buf[FF_MAX_SS]; /* File private data read/write window */
 #endif
 } FIL;