[PATCH] drm/amd/powerplay/hwmgr: add missing header dependencies

We get 3 warnings when building kernel with W=1: drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/pp_acpi.c:29:6: warning: no previous prototype for 'acpi_atcs_functions_supported' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/pp_acpi.c:47:6: warning: no previous prototype

[PATCH] drm/amd/powerplay/hwmgr: add missing header dependencies

We get 3 warnings when building kernel with W=1: drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/pp_acpi.c:29:6: warning: no previous prototype for 'acpi_atcs_functions_supported' [-Wmissing-prototypes] drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/pp_acpi.c:47:6: warning: no previous prototype