can: flexcan: flexcan_chip_start(): adjust comment to match the code

With the conversion of the flexcan driver to support both timestamp and
FIFO mode the setup of the MCR register ("enable fifo") has been moved.

This patch moves the comment too, in order to match the code again.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/flexcan.c

@@ -935,7 +935,6 @@ static int flexcan_chip_start(struct net_device *dev)
 	/* MCR
 	 *
 	 * enable freeze
-	 * enable fifo
 	 * halt now
 	 * only supervisor access
 	 * enable warning int
@@ -950,6 +949,12 @@ static int flexcan_chip_start(struct net_device *dev)
 		FLEXCAN_MCR_WRN_EN | FLEXCAN_MCR_SRX_DIS | FLEXCAN_MCR_IRMQ |
 		FLEXCAN_MCR_IDAM_C | FLEXCAN_MCR_MAXMB(FLEXCAN_TX_MB);
 
+	/* MCR
+	 *
+	 * FIFO:
+	 * - disable for timestamp mode
+	 * - enable for FIFO mode
+	 */
 	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
 		reg_mcr &= ~FLEXCAN_MCR_FEN;
 	else