ARM: defconfig: drop CONFIG_NET_VENDOR_ASIX=y

This option is 'default y' and has always been this way, the
line was added in error.

Fixes: dfe21dca ("ARM: defconfig: Enable ax88796c driver for Exynos boards")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -254,7 +254,6 @@ CONFIG_SATA_HIGHBANK=y
 CONFIG_SATA_MV=y
 CONFIG_SATA_RCAR=y
 CONFIG_NETDEVICES=y
-CONFIG_NET_VENDOR_ASIX=y
 CONFIG_VIRTIO_NET=y
 CONFIG_B53_SPI_DRIVER=m
 CONFIG_B53_MDIO_DRIVER=m