drm/amd/pm: remove duplicate include in 'arcturus_ppt.c'

'amdgpu_dpm.h' included in 'arcturus_ppt.c' is duplicated.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c

@@ -46,7 +46,6 @@
 #include <linux/pci.h>
 #include "amdgpu_ras.h"
 #include "smu_cmn.h"
-#include "amdgpu_dpm.h"
 
 /*
  * DO NOT use these for err/warn/info/debug messages.