drm/i915/cx0: prefer forward declarations over includes

#include <linux/bitfield.h>

#include <linux/bits.h>

#include "i915_drv.h"

#include "intel_display_types.h"

struct drm_i915_private;

struct intel_encoder;

struct intel_crtc_state;

enum icl_port_dpll_id;

enum phy;

struct drm_i915_private;

struct intel_atomic_state;

struct intel_c10pll_state;

struct intel_c20pll_state;

struct intel_crtc_state;

struct intel_encoder;

struct intel_hdmi;

bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy);

void intel_mtl_pll_enable(struct intel_encoder *encoder,

				     const struct intel_crtc_state *crtc_state);

int intel_cx0_phy_check_hdmi_link_rate(struct intel_hdmi *hdmi, int clock);

int intel_mtl_tbt_calc_port_clock(struct intel_encoder *encoder);

#endif /* __INTEL_CX0_PHY_H__ */