squash! soc: apple: Add support for the AOP co-processor

Adapt to rtkit bindings change.

Author: jannau

drivers/soc/apple/aop.rs

@@ -13,6 +13,7 @@ use kernel::{
     dma::{CoherentAllocation, Device, DmaMask},
     error::from_err_ptr,
     io::mem::IoMem,
+    iosys_map::IoSysMapRef,
     module_platform_driver, new_condvar, new_mutex, of, platform,
     prelude::*,
     soc::apple::aop::{from_fourcc, EPICService, FakehidListener, AOP},
@@ -825,7 +826,7 @@ impl rtkit::Buffer for NoBuffer {
     fn iova(&self) -> Result<usize> {
         unreachable!()
     }
-    fn buf(&mut self) -> Result<&mut [u8]> {
+    fn buf(&mut self) -> Result<IoSysMapRef<'_, u8>> {
         unreachable!()
     }
 }