xtest: pkcs11: fix unused errors

Fix unused parameter and unused variable errors with building
pkcs11_1000.c with OPENSSL disabled, i.e. WITH_OPENSSL = n or undefined.

host/xtest/pkcs11_1000.c:7425:49: error: unused parameter 'c' [-Werror,
-Wunused-parameter]
static void xtest_pkcs11_test_1024(ADBG_Case_t *c)
                                                ^

host/xtest/pkcs11_1000.c:7409:19: error: unused variable
'x509_example_root_ca' [-Werror,-Wunused-const-variable]
static const char x509_example_root_ca[] =
                  ^

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: Jerome Forissier <jerome@forissier.org>
diff --git a/host/xtest/pkcs11_1000.c b/host/xtest/pkcs11_1000.c
index e6188e3..3065b59 100644
--- a/host/xtest/pkcs11_1000.c
+++ b/host/xtest/pkcs11_1000.c
@@ -7406,6 +7406,7 @@
 ADBG_CASE_DEFINE(pkcs11, 1023, xtest_pkcs11_test_1023,
 		 "PKCS11: RSA OAEP key generation and crypto operations");
 
+#ifdef OPENSSL_FOUND
 static const char x509_example_root_ca[] =
 	"-----BEGIN CERTIFICATE-----\n"
 	"MIICDTCCAZOgAwIBAgIBATAKBggqhkjOPQQDAzA+MQswCQYDVQQGEwJGSTEVMBMG\n"
@@ -7421,10 +7422,12 @@
 	"APjyNm4f///vWUN3XFd+BRhS2YHR43c0K4oNVyLqigoMoSqu0zXt9Xm+Lsu5iqgJ\n"
 	"NQ==\n"
 	"-----END CERTIFICATE-----\n";
+#endif
 
 static void xtest_pkcs11_test_1024(ADBG_Case_t *c)
 {
 #ifndef OPENSSL_FOUND
+	(void)c;
 	Do_ADBG_Log("OpenSSL not available, skipping X.509 Certificate tests");
 #else
 	CK_RV rv = CKR_GENERAL_ERROR;