selftests/tls: fix selftests after adding ChaCha20-Poly1305

TLS selftests where broken because of wrong variable types used.
Fix it by changing u16 -> uint16_t

Fixes: 4f336e8 ("selftests/tls: add CHACHA20-POLY1305 to tls selftests")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Link: https://lore.kernel.org/r/1610141865-7142-1-git-send-email-vfedorenko@novek.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/tls.c

@@ -103,8 +103,8 @@ FIXTURE(tls)
 
 FIXTURE_VARIANT(tls)
 {
-	u16 tls_version;
-	u16 cipher_type;
+	uint16_t tls_version;
+	uint16_t cipher_type;
 };
 
 FIXTURE_VARIANT_ADD(tls, 12_gcm)