can: rockchip_canfd: enable full TX-FIFO depth of 2

The previous commit prepared the TX path to make use of the full
TX-FIFO depth as much as possible. Increase the available TX-FIFO
depth to the hardware maximum of 2.

Tested-by: Alibek Omarov <[e-mail]>
Acked-by: Heiko Stuebner <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Marc Kleine-Budde <[e-mail]>

drivers/net/can/rockchip/rockchip_canfd.h

···
 
 #define DEVICE_NAME "rockchip_canfd"
 #define RKCANFD_NAPI_WEIGHT 32
-#define RKCANFD_TXFIFO_DEPTH 1
+#define RKCANFD_TXFIFO_DEPTH 2
 #define RKCANFD_TX_STOP_THRESHOLD 1
 #define RKCANFD_TX_START_THRESHOLD 1