mmc: sh_mmcif: remove redundant .down_pwr() callback

From the original version of sh_mmcif the .set_pwr() callback has only been
used to turn the card's power on, and the .down_pwr() callback has been
used to turn it off. .set_pwr() can be used for both these tasks, which is
also how it is implemented by the only user of this API: the SH7724 ecovec
board.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sh_mmcif.c

@@ -957,8 +957,8 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 			pm_runtime_put(&host->pd->dev);
 			clk_disable(host->hclk);
 			host->power = false;
-			if (p->down_pwr && ios->power_mode == MMC_POWER_OFF)
-				p->down_pwr(host->pd);
+			if (p->set_pwr && ios->power_mode == MMC_POWER_OFF)
+				p->set_pwr(host->pd, 0);
 		}
 		host->state = STATE_IDLE;
 		return;