It doesn't look like Sarge supports it, but it looks like Etch does with the "SKY2" driver. Here's the Kconfig for it, or at least what I think you have.
tristate "SysKonnect Yukon2 support (EXPERIMENTAL)"
depends on PCI
This driver supports Gigabit Ethernet adapters based on the
Marvell Yukon 2 chipset:
88E8053/88E8055/88E8061/88E8062, SysKonnect SK-9E21D/SK-9S21
There is companion driver for the older Marvell Yukon and
Genesis based adapters: skge.
To compile this driver as a module, choose M here: the module
will be called sky2. This is recommended.