Extending CPU dispatch to the tests; fixing a typo

modules/core/test/test_intrin.fp16.cpp

@@ -0,0 +1,11 @@
+#include "test_precomp.hpp"
+#include "test_intrin_utils.hpp"
+
+namespace cvtest { namespace hal {
+TEST(hal_intrin, float16x4) {
+    TheTest<v_float16x4>()
+        .test_loadstore_fp16()
+        .test_float_cvt_fp16()
+        ;
+}
+}}