phylib: Add ID for Marvell 88E1240

Add PHY IDs for Marvell 88E1240. It seems to have close enough programming
models to 1111/1112 for basic support at least.

Also clean up whitespace in the ID list a bit.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>