ARM: zynq: Disable net for cse nor/nand

There is no need to waste 6k if none needs it.

zynq_cse_nand  : all -6486 bss -20 data -136 rodata -606 text -5724
zynq_cse_nor   : all -6486 bss -20 data -136 rodata -606 text -5724

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/zynq_cse_nand_defconfig b/configs/zynq_cse_nand_defconfig
index 9bb02ad..608619e 100644
--- a/configs/zynq_cse_nand_defconfig
+++ b/configs/zynq_cse_nand_defconfig
@@ -40,11 +40,11 @@
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SOURCE is not set
 # CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NET is not set
 # CONFIG_CMD_MISC is not set
 # CONFIG_PARTITIONS is not set
 CONFIG_OF_EMBED=y
 CONFIG_DEFAULT_DEVICE_TREE="zynq-cse-nand"
+# CONFIG_NET is not set
 # CONFIG_DM_WARN is not set
 # CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_SPL_DM_SEQ_ALIAS=y