net: sfp: add quirk for 2.5G OEM BX SFP

net: sfp: add quirk for 2.5G OEM BX SFP

The OEM SFP-2.5G-BX10-D/U SFP module pair is meant to operate with
2500Base-X. However, in their EEPROM they incorrectly specify:
Transceiver codes   : 0x00 0x12 0x00 0x00 0x12 0x00 0x01 0x05 0x00
BR, Nominal         : 2500MBd

Use sfp_quirk_2500basex for this module to allow 2500Base-X mode anyway.
Tested on BananaPi R3.

Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
Reviewed-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/20250218-b4-lkmsub-v1-1-1e51dcabed90@birger-koblitz.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>