[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 <[email protected]>
diff --git a/drivers/media/rc/ir-rc5-sz-decoder.c b/drivers/media/rc/ir-rc5-sz-decoder.c
index d8a53c0..5586bf2 100644
--- a/drivers/media/rc/ir-rc5-sz-decoder.c
+++ b/drivers/media/rc/ir-rc5-sz-decoder.c
@@ -114,7 +114,7 @@
 		IR_dprintk(1, "RC5-sz scancode 0x%04x (toggle: %u)\n",
 			   scancode, toggle);
 
-		ir_keydown(dev, scancode, toggle);
+		rc_keydown(dev, scancode, toggle);
 		data->state = STATE_INACTIVE;
 		return 0;
 	}