[media] staging/lirc: Update lirc TODO files

lirc_i2c provides support for some drivers that have already a RC

driver under drivers/media/video. It should be integrated into those

drivers, in special with drivers/media/video/ir-kbd-i2c.c.

The binding between hdpvr and lirc_zilog is currently disabled,

due to an OOPS reported a few years ago when both the hdpvr and cx18

drivers were loaded in his system. More details can be seen at:

	http://www.mail-archive.com/linux-media@vger.kernel.org/msg09163.html

More tests need to be done, in order to fix the reported issue.

There's a conflict between ir-kbd-i2c: Both provide support for RX events.

Such conflict needs to be fixed, before moving it out of staging.

The way I2C probe works, it will try to register the driver twice, one

for RX and another for TX. The logic needs to be fixed to avoid such

issue.