drm/amdgpu/radeon: Use radeon by default for CIK GPUs

Even if CONFIG_DRM_AMDGPU_CIK is enabled.

There is no feature parity yet for CIK, in particular amdgpu doesn't
support HDMI/DisplayPort audio without DC.

v2:
* Clarify the lack of feature parity being related to HDMI/DP audio.
* Fix "SI" typo in DRM_AMDGPU_CIK help entry.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 103d41a..428363f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -249,8 +249,8 @@ module_param_named(si_support, amdgpu_si_support, int, 0444);
 #endif
 
 #ifdef CONFIG_DRM_AMDGPU_CIK
-int amdgpu_cik_support = 1;
-MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled (default), 0 = disabled)");
+int amdgpu_cik_support = 0;
+MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled, 0 = disabled (default))");
 module_param_named(cik_support, amdgpu_cik_support, int, 0444);
 #endif