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/starqltechn_defconfig b/configs/starqltechn_defconfig
index 608d001..9687afd 100644
--- a/configs/starqltechn_defconfig
+++ b/configs/starqltechn_defconfig
@@ -14,6 +14,7 @@
 CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_BMP=y
 # CONFIG_NET is not set