stmmac: intel: remove unused 'has_crossts' flag

The 'has_crossts' flag was not used anywhere in the stmmac driver,
removing it from both header file and dwmac-intel driver.
Signed-off-by: Wong Vee Khee <veekhee@apple.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Link: https://lore.kernel.org/r/20220817064324.10025-1-veekhee@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

@@ -610,7 +610,6 @@ static int intel_mgbe_common_data(struct pci_dev *pdev,
 	plat->int_snapshot_num = AUX_SNAPSHOT1;
 	plat->ext_snapshot_num = AUX_SNAPSHOT0;
 
-	plat->has_crossts = true;
 	plat->crosststamp = intel_crosststamp;
 	plat->int_snapshot_en = 0;
 

include/linux/stmmac.h

@@ -257,7 +257,6 @@ struct plat_stmmacenet_data {
 	u8 vlan_fail_q;
 	unsigned int eee_usecs_rate;
 	struct pci_dev *pdev;
-	bool has_crossts;
 	int int_snapshot_num;
 	int ext_snapshot_num;
 	bool int_snapshot_en;