[media] Rename all public generic RC functions from ir_ to rc_

Those functions are not InfraRed specific. So, rename them to properly
reflect it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/dm1105/dm1105.c b/drivers/media/dvb/dm1105/dm1105.c
index e9cacf6..2d8b404 100644
--- a/drivers/media/dvb/dm1105/dm1105.c
+++ b/drivers/media/dvb/dm1105/dm1105.c
@@ -531,7 +531,7 @@
 
 	data = (ircom >> 8) & 0x7f;
 
-	ir_keydown(ir->dev, data, 0);
+	rc_keydown(ir->dev, data, 0);
 }
 
 /* work handler */