Staging: sep: do not select the driver by default

The Kconfig file should not have 'y' as the default, especially
as the driver will crash a machine if it is loaded and the hardware
is not present.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Mark Allyn <mark.a.allyn@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>