rocr: Restore mmap flags back to MAP_PRIVATE (#2886)

Change mmap flags back to MAP_PRIVATE as MAP_SHARED increases allocation
time. Transparent huge pages are disabled for MAP_SHARED by default.

projects/rocr-runtime/libhsakmt/src/fmm.c

@@ -2125,7 +2125,7 @@ static void *fmm_allocate_host_gpu(HsaKFDContext *ctx,
 
 		/* Map anonymous pages */
 		if (mmap(mem, MemorySizeInBytes, PROT_READ | PROT_WRITE,
-			 MAP_ANONYMOUS | MAP_SHARED | MAP_FIXED, -1, 0)
+			 MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0)
 		    == MAP_FAILED)
 			goto out_release_area;