Decrease max line length from 2000 to 200

Decrease maximun line length from 2000 to 200 to reduce heap usage.

Author: Arto Kinnunen

features/frameworks/mbed-client-cli/source/ns_cmdline.c

@@ -215,7 +215,7 @@
 #endif
 // Maximum length of input line
 #ifndef MBED_CONF_CMDLINE_MAX_LINE_LENGTH
-#define MBED_CONF_CMDLINE_MAX_LINE_LENGTH 2000
+#define MBED_CONF_CMDLINE_MAX_LINE_LENGTH 200
 #endif
 // Maximum number of arguments in a single command
 #ifndef MBED_CONF_CMDLINE_ARGS_MAX_COUNT