powerpc: wii_defconfig: Disable Ethernet driver support code

The Wii doesn't have built-in Ethernet and USB Ethernet adapters are in
a different menu. Disable CONFIG_ETHERNET to save some space in support
code for Ethernet drivers.

Note that this patch doesn't disable any Ethernet drivers, because they
are not enabled by default.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/configs/wii_defconfig

@@ -49,6 +49,7 @@ CONFIG_BLK_DEV_RAM_COUNT=2
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_NETDEVICES=y
+# CONFIG_ETHERNET is not set
 CONFIG_B43=y
 CONFIG_B43_SDIO=y
 # CONFIG_B43_PHY_LP is not set