Use kfd fd to mmap mmio

Change-Id: Iadd2e1ea46d0951aaa5a6cefbc7d42d1b2c1f653
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>

src/fmm.c

@@ -2292,7 +2292,7 @@ HSAKMT_STATUS fmm_init_process_apertures(unsigned int NumNodes)
 		gpu_mem[gpu_mem_id].mmio_aperture.base = map_mmio(
 				gpu_mem[gpu_mem_id].node_id,
 				gpu_mem[gpu_mem_id].gpu_id,
-				gpu_mem[gpu_mem_id].drm_render_fd);
+				kfd_fd);
 		if (gpu_mem[gpu_mem_id].mmio_aperture.base)
 			gpu_mem[gpu_mem_id].mmio_aperture.limit = (void *)
 			((char *)gpu_mem[gpu_mem_id].mmio_aperture.base +