K 10
svn:author
V 7
johalun
K 8
svn:date
V 27
2019-05-19T15:44:21.636594Z
K 7
svn:log
V 416
LinuxKPI: Finalize move of lindebugfs from ports to base.

The source file was moved to base earlier and also improved upon,
but never compiled in. This patch will:
- Make a module in sys/modules
- Make lindebugfs depend on linuxkpi (for seq_file)
- Check if read/write functions are set before calling, DRM drivers
  don't always set both of them.

Reviewed by:	hps
Approved by:	imp (mentor), hps
MFC after:	1 week

END