linux-yocto/3.8: qemumips boot fixes and netfilter kernel features

Updating the linux-yocto-3.8 recipes to fix two issues:

1) qemumips boot

This is fixed by:

  Revert "Input: i8042-io - fix up region handling on MIPS"

And by disabling ftrace for qemumips boards

2) netfilter options being dropped

When KERNEL_EXTRA_FEATURES was introduced, and allowed to be
inhibited, the variable was only applied to qemux86 machines. It
should be applied ot all machine types (unless inhibited), so we
restore that functionality.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
kern-tools: fix conditional configuration items

Variables defined in .scc files have two purposes:

   - Documentation in the meta-series
   - Variables that can be tested in sub sections and other features

The second part of this functionality was broken when fixing configuration
for tiny/small systems. As a result, arch tests were failing and configs were
dropped.  This restores the existing functionality.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>