hi andrewb,
i guess that your dep-files are outdated.
perhaps you should update your dep-files?
the kernel of 4.6.1 is 3.0.21 and you have to use the modules according to your kernel:
tc@box:~$ uname -a
Linux box 3.0.21-tinycore #3021 SMP Sat Feb 18 11:54:11 EET 2012 i686 GNU/Linux
that means that you need v4l-dvb-3.0.21-tinycore.tcz for tinycore 4.6.1