net: stmmac: intel: remove unnecessary field struct plat_stmmacenet_data::ext_snapshot_num

Do not store bitmask for enabling AUX_SNAPSHOT0. The previous commit
("net: stmmac: fix PPS capture input index") takes care of calculating
the proper bit mask from the request data's extts.index field, which is
0 if not explicitly specified otherwise.
Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

@@ -605,7 +605,6 @@ static int intel_mgbe_common_data(struct pci_dev *pdev,
 	plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR;
 
 	plat->int_snapshot_num = AUX_SNAPSHOT1;
-	plat->ext_snapshot_num = AUX_SNAPSHOT0;
 
 	plat->crosststamp = intel_crosststamp;
 	plat->flags &= ~STMMAC_FLAG_INT_SNAPSHOT_EN;

include/linux/stmmac.h

@@ -303,7 +303,6 @@ struct plat_stmmacenet_data {
 	unsigned int eee_usecs_rate;
 	struct pci_dev *pdev;
 	int int_snapshot_num;
-	int ext_snapshot_num;
 	int msi_mac_vec;
 	int msi_wol_vec;
 	int msi_lpi_vec;