[PATCH] drm/amdgpu: fix unused-function error

[Ren Zhijie]

If CONFIG_DRM_AMDGPU=y and CONFIG_DRM_AMD_DC is not set,
gcc complained about unused-function :

drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1705:13: error: ‘amdgpu_discovery_set_sriov_display’ defined but not used [-Werror=unused-function]
 static void amdgpu_discovery_set_sriov_display(struct amdgpu_device *adev)
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

To fix this error, use CONFIG_DRM_AMD_DC to wrap
the definition of amdgpu_discovery_set_sriov_display().

Fixes: 25263da37693 ("drm/amdgpu: rework SR-IOV virtual display handling")
Signed-off-by: Ren Zhijie <renzhijie2 at huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index 6b48178455bc..2509341df92d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -1702,11 +1702,13 @@ static int amdgpu_discovery_set_smu_ip_blocks(struct amdgpu_device *adev)
 	return 0;
 }
 
+#if defined(CONFIG_DRM_AMD_DC)
 static void amdgpu_discovery_set_sriov_display(struct amdgpu_device *adev)
 {
 	amdgpu_device_set_sriov_virtual_display(adev);
 	amdgpu_device_ip_block_add(adev, &amdgpu_vkms_ip_block);
 }
+#endif
 
 static int amdgpu_discovery_set_display_ip_blocks(struct amdgpu_device *adev)
 {
-- 
2.17.1