mmc: mmci: introduce dma_priv pointer to mmci_host

-Introduces dma_priv pointer to define specific
needs for each dma engine. This patch is needed to prepare
sdmmc variant with internal dma which not use dmaengine API.
-Moves next cookie to mmci host structure to share same cookie
management between all variants.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mmci.h

@@ -277,12 +277,6 @@ struct mmci_host_ops {
 	void (*dma_release)(struct mmci_host *host);
 };
 
-struct mmci_host_next {
-	struct dma_async_tx_descriptor	*dma_desc;
-	struct dma_chan			*dma_chan;
-	s32				cookie;
-};
-
 struct mmci_host {
 	phys_addr_t		phybase;
 	void __iomem		*base;
@@ -325,19 +319,14 @@ struct mmci_host {
 	int (*get_rx_fifocnt)(struct mmci_host *h, u32 status, int remain);
 
 	u8			use_dma:1;
-#ifdef CONFIG_DMA_ENGINE
-	/* DMA stuff */
-	struct dma_chan		*dma_current;
-	struct dma_chan		*dma_rx_channel;
-	struct dma_chan		*dma_tx_channel;
-	struct dma_async_tx_descriptor	*dma_desc_current;
-	struct mmci_host_next	next_data;
 	u8			dma_in_progress:1;
+	void			*dma_priv;
 
-#define dma_inprogress(host)	((host)->dma_in_progress)
-#endif
+	s32			next_cookie;
 };
 
+#define dma_inprogress(host)	((host)->dma_in_progress)
+
 int mmci_dmae_setup(struct mmci_host *host);
 void mmci_dmae_release(struct mmci_host *host);