1. Removed the makeoptions line from arch/i386/conf/GENERIC. Now
ndis_driver_data.h is simply copied into the kernel build directory instead
of editing the config file to specify its location.
2. Uncommented lines in files.i386 and files.pci related to NDIS. NDIS will
not be compiled into the kernel unless the two lines are uncommented from
GENERIC (I checked using nm), so there is no reason for this to be commented
out.
3. Added ndiscvt to usr.sbin/Makefile.
