drm/amdgpu: remove duplicate include in 'amdgpu_device.c'

'linux/pci.h' included in 'amdgpu_device.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/amdgpu/amdgpu_device.c

@@ -56,7 +56,6 @@
 #include "soc15.h"
 #include "nv.h"
 #include "bif/bif_4_1_d.h"
-#include <linux/pci.h>
 #include <linux/firmware.h>
 #include "amdgpu_vf_error.h"