mmc: sdhci-pci: Remove dead code (rst_n_gpio et al)

There is no user of this member. Remove the dead code for good.

The removal is dependent on the previous removal of the
struct sdhci_pci_data.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20211014132613.27861-6-andriy.shevchenko@linux.intel.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-pci-core.c

@@ -1915,21 +1915,6 @@ int sdhci_pci_enable_dma(struct sdhci_host *host)
 	return 0;
 }
 
-static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
-{
-	struct sdhci_pci_slot *slot = sdhci_priv(host);
-	int rst_n_gpio = slot->rst_n_gpio;
-
-	if (!gpio_is_valid(rst_n_gpio))
-		return;
-	gpio_set_value_cansleep(rst_n_gpio, 0);
-	/* For eMMC, minimum is 1us but give it 10us for good measure */
-	udelay(10);
-	gpio_set_value_cansleep(rst_n_gpio, 1);
-	/* For eMMC, minimum is 200us but give it 300us for good measure */
-	usleep_range(300, 1000);
-}
-
 static void sdhci_pci_hw_reset(struct sdhci_host *host)
 {
 	struct sdhci_pci_slot *slot = sdhci_priv(host);
@@ -2060,7 +2045,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 
 	slot->chip = chip;
 	slot->host = host;
-	slot->rst_n_gpio = -EINVAL;
 	slot->cd_idx = -1;
 
 	host->hw_name = "PCI";
@@ -2086,17 +2070,6 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 			goto cleanup;
 	}
 
-	if (gpio_is_valid(slot->rst_n_gpio)) {
-		if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
-			gpio_direction_output(slot->rst_n_gpio, 1);
-			slot->host->mmc->caps |= MMC_CAP_HW_RESET;
-			slot->hw_reset = sdhci_pci_gpio_hw_reset;
-		} else {
-			dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
-			slot->rst_n_gpio = -EINVAL;
-		}
-	}
-
 	host->mmc->pm_caps = MMC_PM_KEEP_POWER;
 	host->mmc->slotno = slotno;
 	host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;

drivers/mmc/host/sdhci-pci.h

@@ -157,8 +157,6 @@ struct sdhci_pci_slot {
 	struct sdhci_pci_chip	*chip;
 	struct sdhci_host	*host;
 
-	int			rst_n_gpio;
-
 	int			cd_idx;
 	bool			cd_override_level;