[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/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c
index 8b9ab30..bc2a6e4 100644
--- a/drivers/media/dvb/dvb-usb/af9015.c
+++ b/drivers/media/dvb/dvb-usb/af9015.c
@@ -1041,13 +1041,13 @@
 				priv->rc_keycode = buf[12] << 16 |
 					buf[13] << 8 | buf[14];
 			}
-			ir_keydown(d->rc_dev, priv->rc_keycode, 0);
+			rc_keydown(d->rc_dev, priv->rc_keycode, 0);
 		} else {
 			priv->rc_keycode = 0; /* clear just for sure */
 		}
 	} else if (priv->rc_repeat != buf[6] || buf[0]) {
 		deb_rc("%s: key repeated\n", __func__);
-		ir_keydown(d->rc_dev, priv->rc_keycode, 0);
+		rc_keydown(d->rc_dev, priv->rc_keycode, 0);
 	} else {
 		deb_rc("%s: no key press\n", __func__);
 	}