drm/amd/display: Remove duplicated include in dcn35_optc.c

./drivers/gpu/drm/amd/display/dc/dcn35/dcn35_optc.c: dcn35_optc.h is included more than once.
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn35/dcn35_optc.c

@@ -23,7 +23,6 @@
  */
 
 #include "dcn35_optc.h"
-#include "dcn35_optc.h"
 
 #include "dcn30/dcn30_optc.h"
 #include "dcn31/dcn31_optc.h"