toshiba: Remove celleb from Kconfig options

The toshiba drivers had celleb as an optional dependency.
celleb has been dropped [1], so clean that out of Kconfig.

[1] http://patchwork.ozlabs.org/patch/451730/

CC: netdev@vger.kernel.org
CC: Valentin Rothberg <valentinrothberg@gmail.com>
CC: mpe@ellerman.id.au
CC: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: David S. Miller <davem@davemloft.net>