can: mcp251xfd: mark some instances of struct mcp251xfd_priv as const

With the patch 07ff4ae ("time/timecounter: Mark 1st argument of
timecounter_cyc2time() as const") some instances of the struct
mcp251xfd_priv can be marked as const. This patch marks these as
const.

Link: https://lore.kernel.org/r/20210813091027.159379-1-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c

@@ -1456,7 +1456,7 @@ mcp251xfd_rx_ring_update(const struct mcp251xfd_priv *priv,
 }
 
 static void
-mcp251xfd_hw_rx_obj_to_skb(struct mcp251xfd_priv *priv,
+mcp251xfd_hw_rx_obj_to_skb(const struct mcp251xfd_priv *priv,
 			   const struct mcp251xfd_hw_rx_obj_canfd *hw_rx_obj,
 			   struct sk_buff *skb)
 {

drivers/net/can/spi/mcp251xfd/mcp251xfd-timestamp.c

@@ -13,7 +13,7 @@
 
 static u64 mcp251xfd_timestamp_read(const struct cyclecounter *cc)
 {
-	struct mcp251xfd_priv *priv;
+	const struct mcp251xfd_priv *priv;
 	u32 timestamp = 0;
 	int err;
 
@@ -39,7 +39,7 @@ static void mcp251xfd_timestamp_work(struct work_struct *work)
 			      MCP251XFD_TIMESTAMP_WORK_DELAY_SEC * HZ);
 }
 
-void mcp251xfd_skb_set_timestamp(struct mcp251xfd_priv *priv,
+void mcp251xfd_skb_set_timestamp(const struct mcp251xfd_priv *priv,
 				 struct sk_buff *skb, u32 timestamp)
 {
 	struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);

drivers/net/can/spi/mcp251xfd/mcp251xfd.h

@@ -853,7 +853,7 @@ int mcp251xfd_regmap_init(struct mcp251xfd_priv *priv);
 u16 mcp251xfd_crc16_compute2(const void *cmd, size_t cmd_size,
 			     const void *data, size_t data_size);
 u16 mcp251xfd_crc16_compute(const void *data, size_t data_size);
-void mcp251xfd_skb_set_timestamp(struct mcp251xfd_priv *priv,
+void mcp251xfd_skb_set_timestamp(const struct mcp251xfd_priv *priv,
 				 struct sk_buff *skb, u32 timestamp);
 void mcp251xfd_timestamp_init(struct mcp251xfd_priv *priv);
 void mcp251xfd_timestamp_stop(struct mcp251xfd_priv *priv);