ld: lontium-lt9611uxc.c:undefined reference to `drm_connector_hdmi_audio_plugged_notify'

ld: lontium-lt9611uxc.c:undefined reference to `drm_connector_hdmi_audio_plugged_notify'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0d839570765118029aa8bf4a95444c6a11aacf85
commit: c08c123d4cd6ec3ee482d607e29388d0db2d3f1d drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers
date:   7 months ago
config: i386-buildonly-randconfig-005-20260806 (https://download.01.org/0day-ci/archive/20260806/202608060903.vKw3g0Q9-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260806/202608060903.vKw3g0Q9-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: c08c123d4cd6 ("drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608060903.vKw3g0Q9-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: drivers/gpu/drm/bridge/lontium-lt9611uxc.o: in function `lt9611uxc_bridge_hpd_notify':
   lontium-lt9611uxc.c:(.text+0x44f): undefined reference to `drm_connector_hdmi_audio_plugged_notify'
>> ld: lontium-lt9611uxc.c:(.text+0x482): undefined reference to `drm_connector_hdmi_audio_plugged_notify'

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