Convert CONFIG_SYS_MAXARGS to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_MAXARGS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/zynq_cse_nor_defconfig b/configs/zynq_cse_nor_defconfig
index 280627e..2920d87 100644
--- a/configs/zynq_cse_nor_defconfig
+++ b/configs/zynq_cse_nor_defconfig
@@ -25,6 +25,7 @@
 # CONFIG_CMDLINE_EDITING is not set
 # CONFIG_AUTO_COMPLETE is not set
 # CONFIG_SYS_LONGHELP is not set
+CONFIG_SYS_MAXARGS=32
 # CONFIG_CMD_BDI is not set
 # CONFIG_CMD_CONSOLE is not set
 # CONFIG_CMD_BOOTD is not set