audio: use pcm_ioctl() from tinyalsa

Bug: 18137488.
Change-Id: Ic0887837edaf2135ec195cbf863d0840ffdbc521
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index cd9ded8..c658e81 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -209,19 +209,6 @@
     return id;
 }
 
-int pcm_ioctl(void *pcm, int request, ...)
-{
-    va_list ap;
-    void * arg;
-    int pcm_fd = *(int*)pcm;
-
-    va_start(ap, request);
-    arg = va_arg(ap, void *);
-    va_end(ap);
-
-    return ioctl(pcm_fd, request, arg);
-}
-
 int enable_audio_route(struct audio_device *adev,
                        struct audio_usecase *usecase)
 {
diff --git a/hal/audio_hw.h b/hal/audio_hw.h
index bec19d0..1888aa1 100644
--- a/hal/audio_hw.h
+++ b/hal/audio_hw.h
@@ -234,8 +234,6 @@
     int (*offload_effects_stop_output)(audio_io_handle_t, int);
 };
 
-int pcm_ioctl(void *pcm, int request, ...);
-
 int select_devices(struct audio_device *adev,
                    audio_usecase_t uc_id);