[PATCH] drm/amd/display: Fix "dc has no member named dml" compile error

[sunpeng.li at amd.com]

From: Leo Li <sunpeng.li at amd.com>

For DCN disabled builds, dc->dml is stripped out. Therefore, guard usage
in dc_create_state() with CONFIG_DRM_AMD_DC_DCN1_0.

It fixes the following error:

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc.c: In function 'dc_create_state':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc.c:1237:34: error: 'struct dc' has no member named 'dml'
     memcpy(&context->bw_ctx.dml, &dc->dml, sizeof(struct display_mode_lib));
                                     ^~

Signed-off-by: Leo Li <sunpeng.li at amd.com>
CC: Alex Deucher <alexdeucher at gmail.com>
CC: Harry Wentland <Harry.Wentland at amd.com>
CC: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index cebd083..589cd95 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1245,7 +1245,9 @@ struct dc_state *dc_create_state(struct dc *dc)
 	 * initialize and obtain IP and SOC the base DML instance from DC is
 	 * initially copied into every context
 	 */
+#ifdef CONFIG_DRM_AMD_DC_DCN1_0
 	memcpy(&context->bw_ctx.dml, &dc->dml, sizeof(struct display_mode_lib));
+#endif
 
 	kref_init(&context->refcount);
 
-- 
2.7.4