V4L/DVB: staging: Add an specific TODO note for lirc_i2c

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

drivers/staging/lirc/TODO.lirc_i2c

@@ -0,0 +1,3 @@
+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.