SWDEV-280131 - Fix __half2 member access bug

Change-Id: Ic11750d18e4ba47446a7e494c3089a19cb4df783

include/hip/amd_detail/hip_fp16.h

@@ -329,7 +329,7 @@ THE SOFTWARE.
 
         // BEGIN STRUCT __HALF2
         struct __half2 {
-        protected:
+        public:
             union {
                 static_assert(
                     sizeof(_Float16_2) == sizeof(unsigned short[2]), "");
@@ -340,7 +340,7 @@ THE SOFTWARE.
                     unsigned short y;
                 };
             };
-        public:
+
             // CREATORS
             __host__ __device__
             __half2() = default;

include/hip/amd_detail/hip_fp16_gcc.h

@@ -59,10 +59,10 @@ struct __half2_raw {
 
     // BEGIN STRUCT __HALF2
     struct __half2 {
-    protected:
+    public:
         __half x;
         __half y;
-    public:
+
         // CREATORS
         __half2() = default;
         __half2(const __half2_raw& ix)