[hip] Minor fix to silence compilation warnings.

- Add parenthese to silence repeative compilation warnings across
  projects built against hip.


[ROCm/hip commit: 498fe92734]

projects/hip/include/hip/hcc_detail/device_functions.h

@@ -1007,7 +1007,7 @@ void __syncthreads()
    SIZE         15:11   Range: 1..32
  */
 
-#define GETREG_IMMED(SZ,OFF,REG) (SZ << 11) | (OFF << 6) | REG
+#define GETREG_IMMED(SZ,OFF,REG) (((SZ) << 11) | ((OFF) << 6) | (REG))
 
 /*
   __smid returns the wave's assigned Compute Unit and Shader Engine.