lib/oofatfs: Update oofatfs library to R0.13c working branch.

From https://github.com/micropython/oofatfs, branch work-R0.13c,
commit cb05c9486d3b48ffd6bd7542d8dbbab4b1caf790.

Large code pages (932, 936, 949, 950) have been removed from ffunicode.c
because they were not included in previous versions here.

lib/oofatfs/diskio.h

@@ -13,8 +13,6 @@
 extern "C" {
 #endif
 
-
-
 /* Status of Disk Functions */
 typedef BYTE    DSTATUS;
 
@@ -47,11 +45,11 @@ DRESULT disk_ioctl (void *drv, BYTE cmd, void* buff);
 /* Command code for disk_ioctrl fucntion */
 
 /* Generic command (Used by FatFs) */
-#define CTRL_SYNC           0   /* Complete pending write process (needed at _FS_READONLY == 0) */
-#define GET_SECTOR_COUNT    1   /* Get media size (needed at _USE_MKFS == 1) */
-#define GET_SECTOR_SIZE     2   /* Get sector size (needed at _MAX_SS != _MIN_SS) */
-#define GET_BLOCK_SIZE      3   /* Get erase block size (needed at _USE_MKFS == 1) */
-#define CTRL_TRIM           4   /* Inform device that the data on the block of sectors is no longer used (needed at _USE_TRIM == 1) */
+#define CTRL_SYNC           0   /* Complete pending write process (needed at FF_FS_READONLY == 0) */
+#define GET_SECTOR_COUNT    1   /* Get media size (needed at FF_USE_MKFS == 1) */
+#define GET_SECTOR_SIZE     2   /* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
+#define GET_BLOCK_SIZE      3   /* Get erase block size (needed at FF_USE_MKFS == 1) */
+#define CTRL_TRIM           4   /* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */
 #define IOCTL_INIT          5
 #define IOCTL_STATUS        6