ANDROID: fix up abi issue with struct snd_pcm_runtime

A portion of the fix for CVE-2022-1048, commit 0f6947f5f5 ("ALSA: pcm:
Fix races among concurrent hw_params and hw_free calls"), caused an ABI
break by adding a new field to struct snd_pcm_runtime.  Because we have
to keep this new addition, it is safe to move it to the end of the
structure because this is only ever created by the sound core, and
referenced as a pointer everywhere else.

This does require a .xml update also to handle the increased structure
size:

Leaf changes summary: 1 artifact changed
Changed leaf types summary: 1 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 0 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

'struct snd_pcm_runtime at pcm.h:344:1' changed:
  type size changed from 6144 to 6528 (in bits)
  1 data member insertion:
    'mutex buffer_mutex', at offset 6144 (in bits) at pcm.h:432:1
  120 impacted interfaces

Bug: 161946584
Fixes: 0f6947f5f5 ("ALSA: pcm: Fix races among concurrent hw_params and hw_free calls")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I525799616e06c1d2c5513821a3361e99dcb7e553

include/sound/pcm.h

@@ -398,7 +398,6 @@ struct snd_pcm_runtime {
 	wait_queue_head_t tsleep;	/* transfer sleep */
 	struct fasync_struct *fasync;
 	bool stop_operating;		/* sync_stop will be called */
-	struct mutex buffer_mutex;	/* protect for buffer changes */
 
 	/* -- private section -- */
 	void *private_data;
@@ -429,6 +428,9 @@ struct snd_pcm_runtime {
 	/* -- OSS things -- */
 	struct snd_pcm_oss_runtime oss;
 #endif
+#ifndef __GENKSYMS__
+	struct mutex buffer_mutex;	/* protect for buffer changes */
+#endif
 };
 
 struct snd_pcm_group {		/* keep linked substreams */