Remove ath9k hacks

Things seem to be working well with slackware-current as of 8/11/13 so
remove all these network hacks.
Remove kernel packages from blacklist

Everything (for me) seems to be working well, so there is no need (for me)
to build a custom kernel anymore.
Remove suspend hack from rc.local

It seems to work now so remove the suspend the hack.
Update xinitrc touchpad and backlight settings