tci: Fix wrong macro name for debug code

Code which is compiled with CONFIG_TCG_DEBUG (set by configure option
--enable-debug-tcg) should not disable the assert macro by
defining NDEBUG.

With the wrong macro name CONFIG_TCG_DEBUG, all assertions in tci.c
were completely useless because NDEBUG was always defined.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

tci.c

@@ -20,7 +20,7 @@
 #include "config.h"
 
 /* Defining NDEBUG disables assertions (which makes the code faster). */
-#if !defined(CONFIG_TCG_DEBUG) && !defined(NDEBUG)
+#if !defined(CONFIG_DEBUG_TCG) && !defined(NDEBUG)
 # define NDEBUG
 #endif