drm/amd/powerplay: delete dead code in hwmgr.h

	struct vi_dpm_level dpm_level[1];

};

enum PP_Result {

	PP_Result_TableImmediateExit = 0x13,

};

#define PCIE_PERF_REQ_REMOVE_REGISTRY   0

#define PCIE_PERF_REQ_FORCE_LOWPOWER    1

#define PCIE_PERF_REQ_GEN1         2

	PHM_Rv_Magic          = 0x20161121

};

#define PHM_PCIE_POWERGATING_TARGET_GFX            0

#define PHM_PCIE_POWERGATING_TARGET_DDI            1

#define PHM_PCIE_POWERGATING_TARGET_PLLCASCADE     2

#define PHM_PCIE_POWERGATING_TARGET_PHY            3

struct phm_set_power_state_input {

	const struct pp_hw_power_state *pcurrent_state;

	const struct pp_hw_power_state *pnew_state;