Device property memoryBusWidth implementation.

+ Device property memoryBusWidth is added to hipDeviceProp_t struct.
+ Device attribute hipDeviceAttributeMemoryBusWidth is added to hipDeviceAttribute_t struct.
+ Tests update.

include/hip_runtime_api.h

@@ -81,7 +81,8 @@ typedef struct hipDeviceProp_t {
     int maxThreadsDim[3];                       ///< Max number of threads in each dimension (XYZ) of a block.
     int maxGridSize[3];                         ///< Max grid dimensions (XYZ).
     int clockRate;                              ///< Max clock frequency of the multiProcessors in khz.
-    int memoryClockRate;                        ///< Max memory clock frequency in khz.
+    int memoryClockRate;                        ///< Max global memory clock frequency in khz.
+    int memoryBusWidth;                         ///< Global memory bus width in bits.
     size_t totalConstMem;                       ///< Size of shared memory region (in bytes).
     int major;                                  ///< Major compute capability.  On HCC, this is an approximation and features may differ from CUDA CC.  See the arch feature flags for portable ways to query feature caps.
     int minor;                                  ///< Minor compute capability.  On HCC, this is an approximation and features may differ from CUDA CC.  See the arch feature flags for portable ways to query feature caps.
@@ -145,6 +146,7 @@ typedef enum hipDeviceAttribute_t {
     hipDeviceAttributeMaxRegistersPerBlock,                 ///< Maximum number of 32-bit registers available to a thread block. This number is shared by all thread blocks simultaneously resident on a multiprocessor.
     hipDeviceAttributeClockRate,                            ///< Peak clock frequency in kilohertz.
     hipDeviceAttributeMemoryClockRate,                      ///< Peak memory clock frequency in kilohertz.
+    hipDeviceAttributeMemoryBusWidth,                       ///< Global memory bus width in bits.
     hipDeviceAttributeMultiprocessorCount,                  ///< Number of multiprocessors on the device.
     hipDeviceAttributeComputeMode,                          ///< Compute mode that device is currently in.
     hipDeviceAttributeL2CacheSize,                          ///< Size of L2 cache in bytes. 0 if the device doesn't have L2 cache.

include/nvcc_detail/hip_runtime_api.h

@@ -243,7 +243,9 @@ inline static hipError_t hipDeviceGetAttribute(int* pi, hipDeviceAttribute_t att
     case hipDeviceAttributeClockRate:
         cdattr = cudaDevAttrClockRate; break;
     case hipDeviceAttributeMemoryClockRate:
-        cdattr = cudaDevAttrMemoryClockRate:; break;
+        cdattr = cudaDevAttrMemoryClockRate; break;
+    case hipDeviceAttributeMemoryBusWidth:
+        cdattr = cudaDevAttrGlobalMemoryBusWidth; break;
     case hipDeviceAttributeMultiprocessorCount:
         cdattr = cudaDevAttrMultiProcessorCount; break;
     case hipDeviceAttributeComputeMode: