mmc: core: Add open-ended Ext memory addressing

For open-ended read/write - just send CMD22 before issuing the command.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20241006051148.160278-5-avri.altman@wdc.com


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