arm: zynq: Disable networking for zc770 xm011

Ethernet cable is not connected for xm011 that's why disable all
ethernet related configurations.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

configs/zynq_zc770_xm011_defconfig

@@ -24,20 +24,18 @@ CONFIG_CMD_FPGA_LOADP=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_NAND_LOCK_UNLOCK=y
 # CONFIG_CMD_SETEXPR is not set
-CONFIG_CMD_TFTPPUT=y
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_NFS is not set
 CONFIG_CMD_CACHE=y
-CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_FPGA_XILINX=y
 # CONFIG_MMC is not set
 CONFIG_NAND=y
 CONFIG_NAND_ZYNQ=y
-CONFIG_ZYNQ_GEM=y
 CONFIG_DEBUG_UART_ZYNQ=y
 CONFIG_DEBUG_UART_BASE=0xe0001000
 CONFIG_DEBUG_UART_CLOCK=50000000
 CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ZYNQ_SERIAL=y
+CONFIG_REGEX=y
+CONFIG_LIB_RAND=y