x86: add Minisforum MS-A2 Mini PC

x86: add Minisforum MS-A2 Mini PC

This commit renames the network ports of the Minisforum MS-A2
Mini PC: the two 2.5G RJ45 ports are now named lan1 and lan2,
and the two 10G SFP+ ports sfp1 and sfp2.

All four ports are also added to the default lan interface.

--- Hardware Highlights ---
AMD Ryzen™ 9 9955HX/7945HX
Dual DDR5-5600MHz, up to 96GB
2x 10G SFP+, 2x 2.5G RJ45
WiFi 6E, Bluetooth 5.3
Built-in PCIe x16 Slot

Signed-off-by: Til Kaiser <mail@tk154.de>
Link: https://github.com/openwrt/openwrt/pull/19689
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>