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/platform.mk b/plat/arm/board/tc/platform.mk
index 7fdc4fd..7171c24 100644
--- a/plat/arm/board/tc/platform.mk
+++ b/plat/arm/board/tc/platform.mk
@@ -209,7 +209,7 @@
 
     PLAT_INCLUDES	+=	-Iinclude/lib/psa
 
-    $(eval $(call add_define,PLATFORM_TEST))
+    $(eval $(call add_define,PLATFORM_TEST_NV_COUNTERS))
 else ifeq (${PLATFORM_TEST},tfm-testsuite)
     # Add this include as first, before arm_common.mk. This is necessary
     # because arm_common.mk builds Mbed TLS, and platform_test.mk can