extmod/modvfs: Fix build without FFCONF_H

Signed-off-by: Martin Milata <martin@martinmilata.cz>

Author: mmilata

extmod/modvfs.c

@@ -29,10 +29,22 @@
 #if MICROPY_PY_VFS
 
 #include "extmod/vfs.h"
+
+#if MICROPY_VFS_FAT
 #include "extmod/vfs_fat.h"
+#endif
+
+#if MICROPY_VFS_LFS1 || MICROPY_VFS_LFS2
 #include "extmod/vfs_lfs.h"
+#endif
+
+#if MICROPY_VFS_POSIX
 #include "extmod/vfs_posix.h"
+#endif
+
+#if MICROPY_VFS_ROM
 #include "extmod/vfs_rom.h"
+#endif
 
 #if !MICROPY_VFS
 #error "MICROPY_PY_VFS requires MICROPY_VFS"