mmc: sdhci-of-esdhc: Fixup use of of_find_compatible_node()

Callers of of_find_compatible_node() should drop the reference count
accordingly, so let's do that.

Signed-off-by: Liang He <windhl@126.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20220621065259.4079817-1-windhl@126.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>