disabled compiler flag hcc 4.0 for half support

Change-Id: I32175113f4c05d43310b3a05c2a14e12f6d48b09

hipamd/src/hip_fp16.cpp

@@ -22,7 +22,6 @@ THE SOFTWARE.
 
 #include"hip/hip_fp16.h"
 
-#if __CLANG_VERSION__ == 35
 
 static const unsigned sign_val = 0x8000;
 static const __half __half_value_one_float = {0x3C00};
@@ -375,5 +374,3 @@ __device__ __half2 __low2half2(const __half2 a, const __half2 b){
   return {a.q, b.q};
 }
 
-#endif
-