macosx: fix avcodec-hw option implementation

The option is presented to the user in a simplified way, since there is only one hardware acceleration module on the Mac.

modules/gui/macosx/simple_prefs.m

@@ -545,7 +545,8 @@ static inline char * __config_GetLabel(vlc_object_t *p_this, const char *psz_nam
     [self setupField: o_input_httpproxypwd_sfld forOption:"http-proxy-pwd"];
     [o_input_postproc_fld setIntValue: config_GetInt(p_intf, "postproc-q")];
     [o_input_postproc_fld setToolTip: _NS(config_GetLabel(p_intf, "postproc-q"))];
-    [self setupButton: o_input_avcodec_hw_ckb forBoolValue:"avcodec-hw"];
+    [o_input_avcodec_hw_ckb setState: !strcmp(config_GetPsz(p_intf,"avcodec-hw"), "vdadecoder")];
+    [o_input_avcodec_hw_ckb setToolTip: _NS(config_GetLabel(p_intf,"avcodec-hw") ?: "")];
 
     [self setupButton: o_input_avi_pop forIntList: "avi-index"];
 
@@ -882,7 +883,10 @@ static inline void save_module_list(intf_thread_t * p_intf, id object, const cha
         SaveIntList(o_input_avi_pop, "avi-index");
 
         config_PutInt(p_intf, "rtsp-tcp", [o_input_rtsp_ckb state]);
-        config_PutInt(p_intf, "avcodec-hw", [o_input_avcodec_hw_ckb state]);
+        if ([o_input_avcodec_hw_ckb state])
+            config_PutPsz(p_intf, "avcodec-hw", "vdadecoder");
+        else
+            config_PutPsz(p_intf, "avcodec-hw", "");
         SaveIntList(o_input_skipLoop_pop, "avcodec-skiploopfilter");
 
         config_PutInt(p_intf, "mkv-preload-local-dir", [o_input_mkv_preload_dir_ckb state]);