Don't pickup linux/input.h, this should fix plist failure because the evdev
modules is build (which is useless for us). 
Disable alsa support..
Remove FreeBSD 6.x patch.
Disable mmap support on FreeBSD versions that don't have support for it. 
PR: ports/161567 
Submitted by: avg@ 
Reported by: Takefu <firstname.lastname@example.org>