[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/rc/ir-nec-decoder.c b/drivers/media/rc/ir-nec-decoder.c
index 8ff157a..235d774 100644
--- a/drivers/media/rc/ir-nec-decoder.c
+++ b/drivers/media/rc/ir-nec-decoder.c
@@ -88,7 +88,7 @@
 			data->state = STATE_BIT_PULSE;
 			return 0;
 		} else if (eq_margin(ev.duration, NEC_REPEAT_SPACE, NEC_UNIT / 2)) {
-			ir_repeat(dev);
+			rc_repeat(dev);
 			IR_dprintk(1, "Repeat last key\n");
 			data->state = STATE_TRAILER_PULSE;
 			return 0;
@@ -114,7 +114,7 @@
 			geq_margin(ev.duration,
 			NEC_TRAILER_SPACE, NEC_UNIT / 2)) {
 				IR_dprintk(1, "Repeat last key\n");
-				ir_repeat(dev);
+				rc_repeat(dev);
 				data->state = STATE_INACTIVE;
 				return 0;
 
@@ -178,7 +178,7 @@
 		if (data->is_nec_x)
 			data->necx_repeat = true;
 
-		ir_keydown(dev, scancode, 0);
+		rc_keydown(dev, scancode, 0);
 		data->state = STATE_INACTIVE;
 		return 0;
 	}