extmod: Rename vfs_fat_file.h to vfs_fat.h.

And move declaration of mp_fat_vfs_type to this file.

extmod/vfs_fat.h

@@ -0,0 +1,39 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+struct _fs_user_mount_t;
+
+extern const byte fresult_to_errno_table[20];
+extern const mp_obj_type_t mp_fat_vfs_type;
+
+struct _fs_user_mount_t *ff_get_vfs(const char **path);
+
+mp_obj_t fatfs_builtin_open(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kwargs);
+mp_obj_t fatfs_builtin_open_self(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs);
+MP_DECLARE_CONST_FUN_OBJ_KW(mp_builtin_open_obj);
+
+mp_obj_t fat_vfs_listdir(const char *path, bool is_str_type);
+mp_obj_t fat_vfs_listdir2(struct _fs_user_mount_t *vfs, const char *path, bool is_str_type);