Fix warpSize, for related issue in hipeigen and torch

Change-Id: Ic66b24923a363304dca189011869ba7a0a6f8895

hipamd/include/hip/hcc_detail/hip_runtime.h

@@ -159,8 +159,7 @@ extern int HIP_TRACE_API;
 
 // TODO - hipify-clang - change to use the function call.
 //#define warpSize hc::__wavesize()
-extern const int warpSize;
-
+static constexpr int warpSize = 64;
 
 #define clock_t long long int
 __device__ long long int clock64();

hipamd/src/device_util.cpp

@@ -835,10 +835,6 @@ __device__ float __hip_ynf(int n, float x)
     return b0;
 }
 
-
-
-const int warpSize = 64;
-
 __device__ long long int clock64() { return (long long int)hc::__cycle_u64(); };
 __device__ clock_t clock() { return (clock_t)hc::__cycle_u64(); };