smatch reports these similar problems in dcn20
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_dsc.c:53:24:
  warning: symbol 'dcn20_dsc_funcs' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_dwb.c:304:25:
  warning: symbol 'dcn20_dwbc_funcs' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_mmhubbub.c:300:28:
  warning: symbol 'dcn20_mmhubbub_funcs' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_mpc.c:545:24:
  warning: symbol 'dcn20_mpc_funcs' was not declared. Should it be static?
All of these are only used in their definition file, so they should be static
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
 static void dsc2_disable(struct display_stream_compressor *dsc);
 static void dsc2_disconnect(struct display_stream_compressor *dsc);
 
-const struct dsc_funcs dcn20_dsc_funcs = {
+static const struct dsc_funcs dcn20_dsc_funcs = {
        .dsc_get_enc_caps = dsc2_get_enc_caps,
        .dsc_read_state = dsc2_read_state,
        .dsc_validate_stream = dsc2_validate_stream,
 
 
 }
 
-const struct dwbc_funcs dcn20_dwbc_funcs = {
+static const struct dwbc_funcs dcn20_dwbc_funcs = {
        .get_caps               = dwb2_get_caps,
        .enable                 = dwb2_enable,
        .disable                = dwb2_disable,
 
        dump_info->size         = dest_height * (mcif_params->luma_pitch + mcif_params->chroma_pitch);
 }
 
-const struct mcif_wb_funcs dcn20_mmhubbub_funcs = {
+static const struct mcif_wb_funcs dcn20_mmhubbub_funcs = {
        .enable_mcif            = mmhubbub2_enable_mcif,
        .disable_mcif           = mmhubbub2_disable_mcif,
        .config_mcif_buf        = mmhubbub2_config_mcif_buf,
 
        return NULL;
 }
 
-const struct mpc_funcs dcn20_mpc_funcs = {
+static const struct mpc_funcs dcn20_mpc_funcs = {
        .read_mpcc_state = mpc1_read_mpcc_state,
        .insert_plane = mpc1_insert_plane,
        .remove_mpcc = mpc1_remove_mpcc,