drm/amd/display: change several dcn201 variables storage-class-specifier to static

smatch reports these similar problems in dcn201
drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn201/dcn201_clk_mgr.c:165:22:
  warning: symbol 'dcn201_funcs' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_resource.c:77:30:
  warning: symbol 'dcn201_ip' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_resource.c:139:37:
  warning: symbol 'dcn201_soc' was not declared. Should it be static?
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_mpc.c:79:24:
  warning: symbol 'dcn201_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>

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn201/dcn201_clk_mgr.c

@@ -162,7 +162,7 @@ static void dcn201_update_clocks(struct clk_mgr *clk_mgr_base,
 	}
 }
 
-struct clk_mgr_funcs dcn201_funcs = {
+static struct clk_mgr_funcs dcn201_funcs = {
 	.get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
 	.update_clocks = dcn201_update_clocks,
 	.init_clocks = dcn201_init_clocks,

drivers/gpu/drm/amd/display/dc/dcn201/dcn201_mpc.c

@@ -76,7 +76,7 @@ static void mpc201_init_mpcc(struct mpcc *mpcc, int mpcc_inst)
 	mpcc->shared_bottom = false;
 }
 
-const struct mpc_funcs dcn201_mpc_funcs = {
+static const struct mpc_funcs dcn201_mpc_funcs = {
 	.read_mpcc_state = mpc1_read_mpcc_state,
 	.insert_plane = mpc1_insert_plane,
 	.remove_mpcc = mpc1_remove_mpcc,

drivers/gpu/drm/amd/display/dc/dcn201/dcn201_resource.c

@@ -74,7 +74,7 @@
 #define MIN_DISP_CLK_KHZ 100000
 #define MIN_DPP_CLK_KHZ 100000
 
-struct _vcs_dpi_ip_params_st dcn201_ip = {
+static struct _vcs_dpi_ip_params_st dcn201_ip = {
 	.gpuvm_enable = 0,
 	.hostvm_enable = 0,
 	.gpuvm_max_page_table_levels = 4,
@@ -136,7 +136,7 @@ struct _vcs_dpi_ip_params_st dcn201_ip = {
 	.number_of_cursors = 1,
 };
 
-struct _vcs_dpi_soc_bounding_box_st dcn201_soc = {
+static struct _vcs_dpi_soc_bounding_box_st dcn201_soc = {
 	.clock_limits = {
 			{
 				.state = 0,