can: ctucanfd: ctucan_interrupt(): fix typo

This patch fixes the typo "poniter" -> "pointer" in the kerneldoc of
ctucan_interrupt().

Link: https://lore.kernel.org/all/20220628083204.881311-1-mkl@pengutronix.de
Fixes: 2dcb8e87 ("can: ctucanfd: add support for CTU CAN FD open-source IP core - bus independent part.")
Cc: Ondrej Ille <ondrej.ille@gmail.com>
Cc: Martin Jerabek <martin.jerabek01@gmail.com>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/ctucanfd/ctucanfd_base.c

@@ -1087,7 +1087,7 @@ static void ctucan_tx_interrupt(struct net_device *ndev)
 /**
  * ctucan_interrupt() - CAN Isr
  * @irq:	irq number
- * @dev_id:	device id poniter
+ * @dev_id:	device id pointer
  *
  * This is the CTU CAN FD ISR. It checks for the type of interrupt
  * and invokes the corresponding ISR.