In acp_dma_hw_params(), 'dma_buffer' is initialized, but not used. So
remove it.
sound/soc/amd/acp-pcm-dma.c: In function ‘acp_dma_hw_params’:
sound/soc/amd/acp-pcm-dma.c:673:25: warning: variable ‘dma_buffer’ set but not used [-Wunused-but-set-variable]
  struct snd_dma_buffer *dma_buffer;
Cc: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 {
        int status;
        uint64_t size;
-       struct snd_dma_buffer *dma_buffer;
        struct page *pg;
        struct snd_pcm_runtime *runtime;
        struct audio_substream_data *rtd;
 
-       dma_buffer = &substream->dma_buffer;
-
        runtime = substream->runtime;
        rtd = runtime->private_data;