ARM: shmobile: marzen: Do not enable CONFIG_SMC911X in defconfig

CONFIG_SMC911X is not needed by marzen.
It appears to have been accidently enabled as well
as CONFIG_SMSC911X which is needed by marzen.
Signed-off-by: Simon Horman <horms@verge.net.au>

arch/arm/configs/marzen_defconfig

@@ -59,7 +59,6 @@ CONFIG_NETDEVICES=y
 # CONFIG_NET_VENDOR_MICREL is not set
 # CONFIG_NET_VENDOR_NATSEMI is not set
 # CONFIG_NET_VENDOR_SEEQ is not set
-CONFIG_SMC911X=y
 CONFIG_SMSC911X=y
 # CONFIG_NET_VENDOR_STMICRO is not set
 # CONFIG_WLAN is not set