Test: Enable FP usage in NSPE

1. Enable FP usage in NSPE by adding FP compile option for NS test
   framework and NS library.
2. Add FP test cases in NSPE.

Signed-off-by: Feder Liang <Feder.Liang@arm.com>
Change-Id: I95d97fbfb06e40ef3d4caa5b8f85a52a29c37a46
diff --git a/test/config/default_ns_test_config.cmake b/test/config/default_ns_test_config.cmake
index e023776..f601e15 100644
--- a/test/config/default_ns_test_config.cmake
+++ b/test/config/default_ns_test_config.cmake
@@ -1,5 +1,5 @@
 #-------------------------------------------------------------------------------
-# Copyright (c) 2021, Arm Limited. All rights reserved.
+# Copyright (c) 2021-2022, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -26,6 +26,7 @@
 set(TEST_NS_FLIH_IRQ        OFF       CACHE BOOL      "Whether to build NS regression First-Level Interrupt Handling tests")
 set(TEST_NS_MULTI_CORE      ON        CACHE BOOL      "Whether to build NS regression multi-core tests")
 set(TEST_NS_MANAGE_NSID     ON        CACHE BOOL      "Whether to build NS regression NSID management tests")
+set(TEST_NS_FPU             OFF       CACHE BOOL      "Whether to build NS regression FPU tests")
 
 ######################### Platform specific setting ############################