drm/i915: Rename PLL hw_state variables/arguments

We have zero consistency in out PLL state naming scheme. Try
to unify things a bit by using 'dpll_hw_state' for high level
stuff and just 'hw_state' for low level stuff. Currently both
are the same, but I want to unionize intel_dpll_hw_state at
which point using different names can make it more clear whether
we're talking about the whole union or just the embedded platform
specific struct.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412182703.19916-4-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_dpll_mgr.h

@@ -365,10 +365,10 @@ void intel_update_active_dpll(struct intel_atomic_state *state,
 			      struct intel_encoder *encoder);
 int intel_dpll_get_freq(struct drm_i915_private *i915,
 			const struct intel_shared_dpll *pll,
-			const struct intel_dpll_hw_state *pll_state);
+			const struct intel_dpll_hw_state *dpll_hw_state);
 bool intel_dpll_get_hw_state(struct drm_i915_private *i915,
 			     struct intel_shared_dpll *pll,
-			     struct intel_dpll_hw_state *hw_state);
+			     struct intel_dpll_hw_state *dpll_hw_state);
 void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state);
 void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state);
 void intel_shared_dpll_swap_state(struct intel_atomic_state *state);
@@ -379,7 +379,7 @@ void intel_dpll_sanitize_state(struct drm_i915_private *i915);
 
 void intel_dpll_dump_hw_state(struct drm_i915_private *i915,
 			      struct drm_printer *p,
-			      const struct intel_dpll_hw_state *hw_state);
+			      const struct intel_dpll_hw_state *dpll_hw_state);
 bool intel_dpll_compare_hw_state(struct drm_i915_private *i915,
 				 const struct intel_dpll_hw_state *a,
 				 const struct intel_dpll_hw_state *b);