drm/sun4i: Fix compilation error

Commit ea64761a ("drm/sun4i: hdmi: Switch to HDMI connector")
introduced a dependency that got renamed in a previous version, but
wasn't properly updated in that driver. Fix the name of the function.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405282205.EU7NUoeQ-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202405282248.U2lhPvCK-lkp@intel.com/
Fixes: ea64761a ("drm/sun4i: hdmi: Switch to HDMI connector")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240528151056.2104153-1-mripard@kernel.orgSigned-off-by: Maxime Ripard <mripard@kernel.org>

drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c

@@ -209,8 +209,7 @@ static enum drm_mode_status
 sun4i_hdmi_connector_mode_valid(struct drm_connector *connector,
 				struct drm_display_mode *mode)
 {
-	unsigned long long rate =
-		drm_connector_hdmi_compute_mode_clock(mode, 8,
+	unsigned long long rate = drm_hdmi_compute_mode_clock(mode, 8,
 							      HDMI_COLORSPACE_RGB);
 
 	return sun4i_hdmi_connector_clock_valid(connector, mode, rate);