can: xilinx_can: Fix flags field initialization for axi can and canps

AXI CAN IP and CANPS IP supports tx fifo empty feature, this patch updates
the flags field for the same.
Signed-off-by: NAppana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/xilinx_can.c

@@ -1426,6 +1426,7 @@ static const struct dev_pm_ops xcan_dev_pm_ops = {
 };
 
 static const struct xcan_devtype_data xcan_zynq_data = {
+	.flags = XCAN_FLAG_TXFEMP,
 	.bittiming_const = &xcan_bittiming_const,
 	.btr_ts2_shift = XCAN_BTR_TS2_SHIFT,
 	.btr_sjw_shift = XCAN_BTR_SJW_SHIFT,
@@ -1433,6 +1434,7 @@ static const struct xcan_devtype_data xcan_zynq_data = {
 };
 
 static const struct xcan_devtype_data xcan_axi_data = {
+	.flags = XCAN_FLAG_TXFEMP,
 	.bittiming_const = &xcan_bittiming_const,
 	.btr_ts2_shift = XCAN_BTR_TS2_SHIFT,
 	.btr_sjw_shift = XCAN_BTR_SJW_SHIFT,