mmc-utils: Add fill_switch_cmd handler

Writing the ext_csd (MMC_SWITCH) is done in several places throught the
code.  Prepare a single handler for that.

This patch has no functional change.

Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20230625103814.105-2-avri.altman@wdc.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
1 file changed