selftests: arm64: Fix -Waddress warning in tpidr2 test

Thanks to -Waddress, the compiler warns that the ksft_test_result()
invocations in the arm64 tpidr2 selftest are always true. Oops.

Fix the test by, err, actually running the test functions.

Fixes: 6d80cb7 ("kselftest/arm64: Convert tpidr2 test to use kselftest.h")
Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

Author: Bala-Vignesh-Reddy

tools/testing/selftests/arm64/abi/tpidr2.c

@@ -227,10 +227,10 @@ int main(int argc, char **argv)
 	ret = open("/proc/sys/abi/sme_default_vector_length", O_RDONLY, 0);
 	if (ret >= 0) {
 		ksft_test_result(default_value(), "default_value\n");
-		ksft_test_result(write_read, "write_read\n");
-		ksft_test_result(write_sleep_read, "write_sleep_read\n");
-		ksft_test_result(write_fork_read, "write_fork_read\n");
-		ksft_test_result(write_clone_read, "write_clone_read\n");
+		ksft_test_result(write_read(), "write_read\n");
+		ksft_test_result(write_sleep_read(), "write_sleep_read\n");
+		ksft_test_result(write_fork_read(), "write_fork_read\n");
+		ksft_test_result(write_clone_read(), "write_clone_read\n");
 
 	} else {
 		ksft_print_msg("SME support not present\n");