SDHCI_QUIRK_UNSTABLE_RO_DETECT is used by only one driver variant.
It was added in 2011 by commit 82b0e23a ("mmc: sdhci: Fix read-only
detection with JMicron 388 chip").

Simplify sdhci by moving the logic to the only place it is used.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20240614080051.4005-4-adrian.hunter@intel.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>