[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/video/cx88/cx88-input.c b/drivers/media/video/cx88/cx88-input.c
index a730338..cfeba4c 100644
--- a/drivers/media/video/cx88/cx88-input.c
+++ b/drivers/media/video/cx88/cx88-input.c
@@ -123,26 +123,26 @@
 
 		data = (data << 4) | ((gpio_key & 0xf0) >> 4);
 
-		ir_keydown(ir->dev, data, 0);
+		rc_keydown(ir->dev, data, 0);
 
 	} else if (ir->mask_keydown) {
 		/* bit set on keydown */
 		if (gpio & ir->mask_keydown)
-			ir_keydown_notimeout(ir->dev, data, 0);
+			rc_keydown_notimeout(ir->dev, data, 0);
 		else
-			ir_keyup(ir->dev);
+			rc_keyup(ir->dev);
 
 	} else if (ir->mask_keyup) {
 		/* bit cleared on keydown */
 		if (0 == (gpio & ir->mask_keyup))
-			ir_keydown_notimeout(ir->dev, data, 0);
+			rc_keydown_notimeout(ir->dev, data, 0);
 		else
-			ir_keyup(ir->dev);
+			rc_keyup(ir->dev);
 
 	} else {
 		/* can't distinguish keydown/up :-/ */
-		ir_keydown_notimeout(ir->dev, data, 0);
-		ir_keyup(ir->dev);
+		rc_keydown_notimeout(ir->dev, data, 0);
+		rc_keyup(ir->dev);
 	}
 }