freevxfs: update Kconfig information

Signed-off-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl>
Signed-off-by: Christoph Hellwig <hch@lst.de>

fs/freevxfs/Kconfig

@@ -9,7 +9,8 @@ config VXFS_FS
 	  these particular OS implementations of vxfs may differ in on-disk
 	  data endianess and/or superblock offset. The vxfs module has been
 	  tested with SCO UnixWare and HP-UX B.10.20 (pa-risc 1.1 arch.)
-	  Currently only readonly access is supported.
+	  Currently only readonly access is supported and VxFX versions
+	  2, 3 and 4. Tests were performed with HP-UX VxFS version 3.
 
 	  NOTE: the file system type as used by mount(1), mount(2) and
 	  fstab(5) is 'vxfs' as it describes the file system format, not