[media] rc-core: merge rc5 and streamzap decoders

Now that the protocol is part of the scancode, it is pretty easy to merge
the rc5 and streamzap decoders. An additional advantage is that the decoder
is now stricter as it waits for the trailing silence before determining that
a command is a valid rc5/streamzap command (which avoids collisions that I've
seen with e.g. Sony protocols).

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/rc/keymaps/rc-streamzap.c

@@ -15,9 +15,7 @@
 static struct rc_map_table streamzap[] = {
 /*
  * The Streamzap remote is almost, but not quite, RC-5, as it has an extra
- * bit in it, which throws the in-kernel RC-5 decoder for a loop. Currently,
- * an additional RC-5-sz decoder is being deployed to support it, but it
- * may be possible to merge it back with the standard RC-5 decoder.
+ * bit in it.
  */
 	{ 0x28c0, KEY_NUMERIC_0 },
 	{ 0x28c1, KEY_NUMERIC_1 },