hal: Add support for channel map in asm

Add support for setting channel map to asm in
multichannel playback.

Change-Id: I6d4135eeb550796148f0fd159a4724f2fc302358
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index a42158e..00adcca 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -2327,6 +2327,8 @@
                 goto error_open;
             }
         }
+        platform_set_stream_channel_map(adev->platform, out->channel_mask,
+                                    out->pcm_device_id);
     } else {
         platform_set_stream_channel_map(adev->platform, out->channel_mask,
                                     out->pcm_device_id);