mmc: mmci: Remove custom ios handler

The custom boardfile ios handler isn't used anywhere in the
kernel. Delete it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220427125557.1608825-1-linus.walleij@linaro.orgSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mmci.c

@@ -1748,10 +1748,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	unsigned long flags;
 	int ret;
 
-	if (host->plat->ios_handler &&
-		host->plat->ios_handler(mmc_dev(mmc), ios))
-			dev_err(mmc_dev(mmc), "platform ios_handler failed\n");
-
 	switch (ios->power_mode) {
 	case MMC_POWER_OFF:
 		if (!IS_ERR(mmc->supply.vmmc))

include/linux/amba/mmci.h

@@ -13,17 +13,11 @@
  * @ocr_mask: available voltages on the 4 pins from the block, this
  * is ignored if a regulator is used, see the MMC_VDD_* masks in
  * mmc/host.h
- * @ios_handler: a callback function to act on specfic ios changes,
- * used for example to control a levelshifter
- * mask into a value to be binary (or set some other custom bits
- * in MMCIPWR) or:ed and written into the MMCIPWR register of the
- * block.  May also control external power based on the power_mode.
  * @status: if no GPIO line was given to the block in this function will
  * be called to determine whether a card is present in the MMC slot or not
  */
 struct mmci_platform_data {
 	unsigned int ocr_mask;
-	int (*ios_handler)(struct device *, struct mmc_ios *);
 	unsigned int (*status)(struct device *);
 };