ASoC: Intel: add dmabuffer to common sst_dsp

Broxton uses HDA DMA so needs to keep dmab in the driver context
so add it
Signed-off-by: GuruprasadX Pawse <guruprasadx.pawse@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/common/sst-dsp-priv.h

@@ -317,6 +317,7 @@ struct sst_dsp {
 	struct skl_cl_dev cl_dev;
 	u32 intr_status;
 	const struct firmware *fw;
+	struct snd_dma_buffer dmab;
 };
 
 /* Size optimised DRAM/IRAM memcpy */