drm/i915/vblank: drop unnecessary i915 local variable

Use struct intel_display where possible.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c925fd0a56ba0a9183b62b7cc0ead0e37264f024.1730144869.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -195,7 +195,6 @@ static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc)
 int intel_crtc_scanline_offset(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
-	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	/*
 	 * The scanline counter increments at the leading edge of hsync.
@@ -225,7 +224,7 @@ int intel_crtc_scanline_offset(const struct intel_crtc_state *crtc_state)
 	 */
 	if (DISPLAY_VER(display) == 2)
 		return -1;
-	else if (HAS_DDI(i915) && intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+	else if (HAS_DDI(display) && intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
 		return 2;
 	else
 		return 1;