Altera TSE: Fix DMA secriptor length initialization

sgdma_descrip is a function name as well as the name of a struct. In
sgdma_initialize(), we should initialize the descriptor length field
with the actual length of a descriptor not with the size of the
function. In order to prevent such things from happening in the future,
rename the function to sgdma_setup_descrip().

Found by sparse which yields the following warning:

drivers/net/ethernet/altera/altera_sgdma.c:74:30: warning: expression using sizeof on a function
Signed-off-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/altera/altera_sgdma.c

@@ -20,7 +20,7 @@
 #include "altera_sgdmahw.h"
 #include "altera_sgdma.h"
 
-static void sgdma_descrip(struct sgdma_descrip *desc,
+static void sgdma_setup_descrip(struct sgdma_descrip *desc,
 				struct sgdma_descrip *ndesc,
 				dma_addr_t ndesc_phys,
 				dma_addr_t raddr,
@@ -71,7 +71,7 @@ int sgdma_initialize(struct altera_tse_private *priv)
 		      SGDMA_CTRLREG_INTEN |
 		      SGDMA_CTRLREG_ILASTD;
 
-	priv->sgdmadesclen = sizeof(sgdma_descrip);
+	priv->sgdmadesclen = sizeof(struct sgdma_descrip);
 
 	INIT_LIST_HEAD(&priv->txlisthd);
 	INIT_LIST_HEAD(&priv->rxlisthd);
@@ -195,7 +195,7 @@ int sgdma_tx_buffer(struct altera_tse_private *priv, struct tse_buffer *buffer)
 	if (sgdma_txbusy(priv))
 		return 0;
 
-	sgdma_descrip(cdesc,			/* current descriptor */
+	sgdma_setup_descrip(cdesc,			/* current descriptor */
 			    ndesc,			/* next descriptor */
 			    sgdma_txphysaddr(priv, ndesc),
 			    buffer->dma_addr,		/* address of packet to xmit */
@@ -309,7 +309,7 @@ u32 sgdma_rx_status(struct altera_tse_private *priv)
 
 
 /* Private functions */
-static void sgdma_descrip(struct sgdma_descrip *desc,
+static void sgdma_setup_descrip(struct sgdma_descrip *desc,
 				struct sgdma_descrip *ndesc,
 				dma_addr_t ndesc_phys,
 				dma_addr_t raddr,
@@ -367,7 +367,7 @@ static int sgdma_async_read(struct altera_tse_private *priv)
 			return 0;
 		}
 
-		sgdma_descrip(cdesc,		/* current descriptor */
+		sgdma_setup_descrip(cdesc,		/* current descriptor */
 				    ndesc,		/* next descriptor */
 				    sgdma_rxphysaddr(priv, ndesc),
 				    0,			/* read addr 0 for rx dma */