subsystem: fs: Use better wrapper macros

Replace `DT_INST_PROP(inst, mount_point)` with
`FSTAB_ENTRY_DT_INST_MOUNT_POINT(inst)`.

Signed-off-by: James Roy <[email protected]>

Author: rruuaanng

subsys/fs/fat_fs.c

@@ -568,7 +568,7 @@ static const struct fs_file_system_t fatfs_fs = {
 	static FATFS fs_data_##inst;                                                               \
 	struct fs_mount_t FS_FSTAB_ENTRY(DT_DRV_INST(inst)) = {                                    \
 		.type = FS_FATFS,                                                                  \
-		.mnt_point = DT_INST_PROP(inst, mount_point),                                      \
+		.mnt_point = FSTAB_ENTRY_DT_INST_MOUNT_POINT(inst),                                \
 		.fs_data = &fs_data_##inst,                                                        \
 		.storage_dev = NULL,                                                               \
 		.flags = FSTAB_ENTRY_DT_MOUNT_FLAGS(DT_DRV_INST(inst)),                            \

subsys/fs/littlefs_fs.c

@@ -1101,7 +1101,7 @@ static struct fs_littlefs fs_data_##inst = { \
 }; \
 struct fs_mount_t FS_FSTAB_ENTRY(DT_DRV_INST(inst)) = { \
 	.type = FS_LITTLEFS, \
-	.mnt_point = DT_INST_PROP(inst, mount_point), \
+	.mnt_point = FSTAB_ENTRY_DT_INST_MOUNT_POINT(inst), \
 	.fs_data = &fs_data_##inst, \
 	.storage_dev = (void *)DT_FIXED_PARTITION_ID(FS_PARTITION(inst)), \
 	.flags = FSTAB_ENTRY_DT_MOUNT_FLAGS(DT_DRV_INST(inst)), \