eth: fix the help in Wangxun's Kconfig

The text was copy&pasted from Intel, adjust it to say Wangxun.

Reported-by: Ingo Saitz <ingo@hannover.ccc.de>
Fixes: 3ce7547e

 ("net: txgbe: Add build support for txgbe")
Link: https://lore.kernel.org/r/20220804182641.1442000-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>