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/meerkat96_defconfig b/configs/meerkat96_defconfig
index 930c998..31e436d 100644
--- a/configs/meerkat96_defconfig
+++ b/configs/meerkat96_defconfig
@@ -15,6 +15,7 @@
 CONFIG_SYS_MEMTEST_START=0x80000000
 CONFIG_SYS_MEMTEST_END=0xa0000000
 CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=32
 # CONFIG_CMD_BOOTD is not set
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMI is not set