drm/i915/cx0: remove the unused intel_is_c10phy()

The intel_is_c10phy() is now unused. Remove.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/486ad2832c567ae491726c6c0cd7144e14469a2f.1710949619.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_cx0_phy.c

@@ -29,21 +29,15 @@
 #define INTEL_CX0_LANE1		BIT(1)
 #define INTEL_CX0_BOTH_LANES	(INTEL_CX0_LANE1 | INTEL_CX0_LANE0)
 
-/* Prefer intel_encoder_is_c10phy() */
-bool intel_is_c10phy(struct drm_i915_private *i915, enum phy phy)
-{
-	if ((IS_LUNARLAKE(i915) || IS_METEORLAKE(i915)) && phy < PHY_C)
-		return true;
-
-	return false;
-}
-
 bool intel_encoder_is_c10phy(struct intel_encoder *encoder)
 {
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 	enum phy phy = intel_encoder_to_phy(encoder);
 
-	return intel_is_c10phy(i915, phy);
+	if ((IS_LUNARLAKE(i915) || IS_METEORLAKE(i915)) && phy < PHY_C)
+		return true;
+
+	return false;
 }
 
 static int lane_mask_to_lane(u8 lane_mask)

drivers/gpu/drm/i915/display/intel_cx0_phy.h

@@ -11,7 +11,6 @@
 #include <linux/bits.h>
 
 enum icl_port_dpll_id;
-enum phy;
 struct drm_i915_private;
 struct intel_atomic_state;
 struct intel_c10pll_state;
@@ -22,7 +21,6 @@ struct intel_crtc_state;
 struct intel_encoder;
 struct intel_hdmi;
 
-bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy);
 bool intel_encoder_is_c10phy(struct intel_encoder *encoder);
 void intel_mtl_pll_enable(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state);