[PATCH] spidernet: fix Kconfig after BPA->CELL rename

We changed the name of the Kconfig symbols along with
the move to arch/powerpc. This one hunk got lost during
the conversion.

From: Jens.Osterkamp@de.ibm.com
Cc: netdev@vger.kernel.org
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>