can: c_can: remove unused variable struct c_can_priv::rxmasked

The member rxmasked of struct c_can_priv is initialized by
c_can_chip_config(), but's it's never used, so remove it.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dario Binacchi <[e-mail]>
Signed-off-by: Marc Kleine-Budde <[e-mail]>

drivers/net/can/c_can/c_can.c

···
 
 	/* Clear all internal status */
 	atomic_set(&priv->tx_active, 0);
-	priv->rxmasked = 0;
 	priv->tx_dir = 0;
 
 	/* set bittiming params */

drivers/net/can/c_can/c_can.h

···
 	struct c_can_raminit raminit_sys;	/* RAMINIT via syscon regmap */
 	void (*raminit)(const struct c_can_priv *priv, bool enable);
 	u32 comm_rcv_high;
-	u32 rxmasked;
 	u32 dlc[];
 };