drm/amdgpu: move misc si headers into amdgpu

Move these to the amdgpu directory to match what we
do for other asics.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/si_dpm.c b/drivers/gpu/drm/amd/amdgpu/si_dpm.c
index ab2dd59..f55e45b 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_dpm.c
@@ -26,7 +26,7 @@
 #include "amdgpu_pm.h"
 #include "amdgpu_dpm.h"
 #include "amdgpu_atombios.h"
-#include "si/sid.h"
+#include "sid.h"
 #include "r600_dpm.h"
 #include "si_dpm.h"
 #include "atom.h"