[media] staging/lirc: Update lirc TODO files

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/lirc/TODO.lirc_i2c

-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.

drivers/staging/lirc/TODO.lirc_zilog

+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.
+