drm/amdgpu: fix VMHUB order to match the hardware

Match our defines with what the hw uses.

Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -124,8 +124,8 @@ extern int amdgpu_param_buf_per_se;
 
 /* max number of VMHUB */
 #define AMDGPU_MAX_VMHUBS			2
-#define AMDGPU_MMHUB				0
-#define AMDGPU_GFXHUB				1
+#define AMDGPU_GFXHUB				0
+#define AMDGPU_MMHUB				1
 
 /* hardcode that limit for now */
 #define AMDGPU_VA_RESERVED_SIZE			(8 << 20)