drivers: can: renesas: properly clear error flag

Fix misleading comments and ensure "Bus Error" flag is properly cleared
(Bus-Off Entry flag was used twice previously).

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

drivers/can/can_renesas_ra.c

@@ -761,10 +761,10 @@ static void can_renesas_ra_set_state_change_callback(const struct device *dev,
 		/* Disable state change interrupt */
 		p_ctrl->p_reg->CFDC->CTR &= (uint32_t)~CANFD_CFG_ERR_IRQ;
 
-		/* Clear state change interrupt flags */
+		/* Clear error flags */
 		p_ctrl->p_reg->CFDC->ERFL &=
 			~(BIT(R_CANFD_CFDC_ERFL_BOEF_Pos) | BIT(R_CANFD_CFDC_ERFL_EWF_Pos) |
-			  BIT(R_CANFD_CFDC_ERFL_EPF_Pos) | BIT(R_CANFD_CFDC_ERFL_BOEF_Pos));
+			  BIT(R_CANFD_CFDC_ERFL_EPF_Pos) | BIT(R_CANFD_CFDC_ERFL_BEF_Pos));
 	}
 
 	data->common.state_change_cb = callback;

drivers/can/can_renesas_rz_canfd.c

@@ -703,10 +703,10 @@ static void can_renesas_rz_set_state_change_callback(const struct device *dev,
 		/* Disable state change interrupt */
 		p_ctrl->p_reg->CFDC->CTR &= (uint32_t)~CANFD_CFG_ERR_IRQ;
 
-		/* Clear state change interrupt flags */
+		/* Clear error flags */
 		p_ctrl->p_reg->CFDC->ERFL &=
 			~(BIT(R_CANFD_CFDC_ERFL_BOEF_Pos) | BIT(R_CANFD_CFDC_ERFL_EWF_Pos) |
-			  BIT(R_CANFD_CFDC_ERFL_EPF_Pos) | BIT(R_CANFD_CFDC_ERFL_BOEF_Pos));
+			BIT(R_CANFD_CFDC_ERFL_EPF_Pos) | BIT(R_CANFD_CFDC_ERFL_BEF_Pos));
 	}
 
 	data->common.state_change_cb = callback;