fix(tc): enable the execution of both platform tests

The C preprocessor cannot compare defines against strings.
Such an expression is always evaluated to be true. Therefore,
its usage in a conditional expression results that always the
first branch is taken. Other branches cannot be reached by
any configuration value. The fix removes this string comparison
and instead it introduces distinct defines for all the cases.

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: Ia1142b31b6778686c74e1e882fe4604fe3b6501d
diff --git a/plat/arm/board/tc/include/tc_plat.h b/plat/arm/board/tc/include/tc_plat.h
index ba1831f..195366e 100644
--- a/plat/arm/board/tc/include/tc_plat.h
+++ b/plat/arm/board/tc/include/tc_plat.h
@@ -9,8 +9,10 @@
 
 void tc_bl31_common_platform_setup(void);
 
-#ifdef PLATFORM_TEST
+#ifdef PLATFORM_TEST_TFM_TESTSUITE
 void run_platform_tests(void);
+#endif
+#ifdef PLATFORM_TEST_NV_COUNTERS
 void nv_counter_test(void);
 #endif