fs/fat: Ignore //... sequences in the file path

This fixes an issue reported by user harishn6 on github.

Signed-off-by: Alan C. Assis <acassis@gmail.com>

fs/fat/fs_fat32dirent.c

@@ -362,6 +362,13 @@ static inline int fat_parsesfname(FAR const char **path,
 #ifdef CONFIG_FAT_LCNAMES
           dirinfo->fd_ntflags = ntlcfound & ntlcenable;
 #endif
+          /* Ignore sequences of //... in the filename */
+
+          while (node && *node == '/')
+            {
+              node++;
+            }
+
           *terminator = ch;
           *path       = node;
           return OK;