mmc: tmio: Remove obsolete .set_pwr() callback()

Commit ca78476e ("mfd: Remove toshiba tmio drivers") removed the
last users of the .set_pwr() callback in the tmio_mmc_data structure.
Remove the callback, and all related infrastructure.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/fbbc13ddd19df2c40933ffa3b82fb14841bf1d4c.1718897545.git.geert+renesas@glider.be

drivers/mmc/host/tmio_mmc.h

@@ -139,9 +139,6 @@ struct tmio_mmc_host {
 	struct mmc_host         *mmc;
 	struct mmc_host_ops     ops;
 
-	/* Callbacks for clock / power control */
-	void (*set_pwr)(struct platform_device *host, int state);
-
 	/* pio related stuff */
 	struct scatterlist      *sg_ptr;
 	struct scatterlist      *sg_orig;

drivers/mmc/host/tmio_mmc_core.c

@@ -880,9 +880,6 @@ static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
 
 	/* .set_ios() is returning void, so, no chance to report an error */
 
-	if (host->set_pwr)
-		host->set_pwr(host->pdev, 1);
-
 	if (!IS_ERR(mmc->supply.vmmc)) {
 		ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
 		/*
@@ -916,9 +913,6 @@ static void tmio_mmc_power_off(struct tmio_mmc_host *host)
 
 	if (!IS_ERR(mmc->supply.vmmc))
 		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
-
-	if (host->set_pwr)
-		host->set_pwr(host->pdev, 0);
 }
 
 static unsigned int tmio_mmc_get_timeout_cycles(struct tmio_mmc_host *host)
@@ -1160,8 +1154,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
 	if (pdata->flags & TMIO_MMC_USE_BUSY_TIMEOUT && !_host->get_timeout_cycles)
 		_host->get_timeout_cycles = tmio_mmc_get_timeout_cycles;
 
-	_host->set_pwr = pdata->set_pwr;
-
 	ret = tmio_mmc_init_ocr(_host);
 	if (ret < 0)
 		return ret;

include/linux/mfd/tmio.h

@@ -100,7 +100,6 @@ struct tmio_mmc_data {
 	dma_addr_t			dma_rx_offset;
 	unsigned int			max_blk_count;
 	unsigned short			max_segs;
-	void (*set_pwr)(struct platform_device *host, int state);
 };
 
 /*