net: sfp: add quirk for Fiberstone GPON-ONU-34-20BI

Fiberstone GPON-ONU-34-20B can operate at 2500base-X, but report 1.2GBd
NRZ in their EEPROM.

The module also require the ignore tx fault fixup similar to Huawei MA5671A
as it gets disabled on error messages with serial redirection enabled.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20230919124720.8210-1-ansuelsmth@gmail.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/phy/sfp.c

@@ -452,6 +452,11 @@ static const struct sfp_quirk sfp_quirks[] = {
 	// Rollball protocol to talk to the PHY.
 	SFP_QUIRK_F("FS", "SFP-10G-T", sfp_fixup_fs_10gt),
 
+	// Fiberstore GPON-ONU-34-20BI can operate at 2500base-X, but report 1.2GBd
+	// NRZ in their EEPROM
+	SFP_QUIRK("FS", "GPON-ONU-34-20BI", sfp_quirk_2500basex,
+		  sfp_fixup_ignore_tx_fault),
+
 	SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp),
 
 	// HG MXPD-483II-F 2.5G supports 2500Base-X, but incorrectly reports