drm/i915; Return the whole buf_trans struct from get_buf_trans()

Raise the abstraction level of the get_buf_trans() functions
a bit more by returning the whole wrapper intel_ddi_buf_trans
struct.

v2: Handle adl-p
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210608073603.2408-8-ville.syrjala@linux.intel.com

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

@@ -58,52 +58,52 @@ struct intel_ddi_buf_trans {
 	u8 num_entries;
 };
 
-bool is_hobl_buf_trans(const union intel_ddi_buf_trans_entry *table);
+bool is_hobl_buf_trans(const struct intel_ddi_buf_trans *table);
 
 int intel_ddi_hdmi_num_entries(struct intel_encoder *encoder,
 			       const struct intel_crtc_state *crtc_state,
 			       int *default_entry);
 
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 hsw_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries);
 
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 bxt_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries);
 
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 adlp_get_dkl_buf_trans(struct intel_encoder *encoder,
 		       const struct intel_crtc_state *crtc_state,
 		       int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 tgl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 tgl_get_dkl_buf_trans(struct intel_encoder *encoder,
 		      const struct intel_crtc_state *crtc_state,
 		      int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 jsl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 ehl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 icl_get_combo_buf_trans(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state,
 			int *n_entries);
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 icl_get_mg_buf_trans(struct intel_encoder *encoder,
 		     const struct intel_crtc_state *crtc_state,
 		     int *n_entries);
 
-const union intel_ddi_buf_trans_entry *
+const struct intel_ddi_buf_trans *
 cnl_get_buf_trans(struct intel_encoder *encoder,
 		  const struct intel_crtc_state *crtc_state,
 		  int *n_entries);