[PATCH] drm/amdgpu/display: avoid unused-variable warning

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Without CONFIG_DEBUG_FS, this newly added function causes a harmless
warning:

amdgpu_dm/amdgpu_dm.c: In function 'amdgpu_dm_connector_late_register':
amdgpu_dm/amdgpu_dm.c:4723:30: error: unused variable 'amdgpu_dm_connector' [-Werror=unused-variable]
 4723 |  struct amdgpu_dm_connector *amdgpu_dm_connector =
      |                              ^~~~~~~~~~~~~~~~~~~

Use an IS_ENABLED() check instead to let the compiler see what
is going on.

Fixes: 14f04fa4834a ("drm/amdgpu/display: add a late register connector callback")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index d3674d805a0a..8ab23fe98059 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -51,9 +51,7 @@
 #include "amdgpu_dm_irq.h"
 #include "dm_helpers.h"
 #include "amdgpu_dm_mst_types.h"
-#if defined(CONFIG_DEBUG_FS)
 #include "amdgpu_dm_debugfs.h"
-#endif
 
 #include "ivsrcid/ivsrcid_vislands30.h"
 
@@ -4723,9 +4721,8 @@ amdgpu_dm_connector_late_register(struct drm_connector *connector)
 	struct amdgpu_dm_connector *amdgpu_dm_connector =
 		to_amdgpu_dm_connector(connector);
 
-#if defined(CONFIG_DEBUG_FS)
-	connector_debugfs_init(amdgpu_dm_connector);
-#endif
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		connector_debugfs_init(amdgpu_dm_connector);
 
 	return 0;
 }
-- 
2.26.0

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