CONFIG_SMALL_KERNEL option added

I've added a new kernel configuration option that reduces the size of 
the kernel without harmfully changing kernel functionality. 
CONFIG_SMALL_KERNEL will turn off some unnecessary informational driver 
initialization messages and the code that is used to generate them. This 
will be expanded as I find more opportunities in the code to apply it. 
For now, if you use the current git snapshot with and without this 
option selected, the results will be something like this:

text    data    bss     dec
55840   6984    50884   113708  CONFIG_SMALL_KERNEL=n
55152   6720    50884   112756  CONFIG_SMALL_KERNEL=y
  -688   -264        0     -952  Change

I also updated the kernel defconfig to match currently available options 
and cleaned out some junk kernel config options that were not referenced 
anywhere in the actual code.

-Jody