[PATCH v2] net/axgbe: fix the build warning for GCC-16

[Venkat Kumar Ande <VenkatKumar.Ande@amd.com>]

Build warning reported for local variable set and not used on GCC-16.
Fix the issue by using the variable for missed register write operation.

../drivers/net/axgbe/axgbe_ethdev.c: In function ‘axgbe_timesync_disable’:
../drivers/net/axgbe/axgbe_ethdev.c:1744:22: warning:
variable ‘mac_tscr’ set but not used [-Wunused-but-set-variable=]
 1744 |         unsigned int mac_tscr = 0;
      |                      ^~~~~~~~

Bugzilla ID: 1819
Fixes: e04449488fdb ("net/axgbe: support IEEE 1588 PTP")
Cc: stable@dpdk.org

Signed-off-by: Venkat Kumar Ande <VenkatKumar.Ande@amd.com>
---
 drivers/net/axgbe/axgbe_ethdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/axgbe/axgbe_ethdev.c b/drivers/net/axgbe/axgbe_ethdev.c
index 31d35ff182..cf3b0d9ef5 100644
--- a/drivers/net/axgbe/axgbe_ethdev.c
+++ b/drivers/net/axgbe/axgbe_ethdev.c
@@ -1742,6 +1742,7 @@ axgbe_timesync_disable(struct rte_eth_dev *dev)
 {
 	struct axgbe_port *pdata = dev->data->dev_private;
 	unsigned int mac_tscr = 0;
+	unsigned int value = 0;
 
 	/*disable timestamp for all pkts*/
 	AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 0);
@@ -1751,6 +1752,11 @@ axgbe_timesync_disable(struct rte_eth_dev *dev)
 	AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 0);
 	/*disable time stamp*/
 	AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 0);
+
+	value = AXGMAC_IOREAD(pdata, MAC_TSCR);
+	value |= mac_tscr;
+	AXGMAC_IOWRITE(pdata, MAC_TSCR, value);
+
 	return 0;
 }
 
-- 
2.40.1.windows.1