drm/amdgpu: Mark all instances of struct drm_info_list as const

All these are compile time constand and the
drm_debugfs_create/remove_files functions take a const
pointer argument.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 83973d0..0129617 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -329,7 +329,7 @@
 
 }
 
-static struct drm_info_list amdgpu_debugfs_sa_list[] = {
+static const struct drm_info_list amdgpu_debugfs_sa_list[] = {
 	{"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},
 };