With W=1, we can see this gcc warning:
drivers/mmc/host/sdhci-brcmstb.c:182:34: warning: ‘sdhci_brcm_of_match’ defined but not used [-Wunused-const-variable=]
182 | static const struct of_device_id sdhci_brcm_of_match[] = {
| ^~~~~~~~~~~~~~~~~~~
Rather than play around more with #ifdef's, the simplest solution is to
just mark this __maybe_unused.
Fixes: 1fad8422c989 ("mmc: sdhci-brcmstb: Allow building with COMPILE_TEST")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/all/202212060700.NjMecjxS-lkp@xxxxxxxxx/
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>