mmc: extend and rename cd-gpio helpers to handle more slot GPIO functions

GPIOs can be used in MMC/SD-card slots not only for hotplug detection, but
also to implement the write-protection pin. Rename cd-gpio helpers to
slot-gpio to make addition of further slot GPIO functions possible.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/cd-gpio.h b/include/linux/mmc/slot-gpio.h
similarity index 68%
rename from include/linux/mmc/cd-gpio.h
rename to include/linux/mmc/slot-gpio.h
index cefaba0..edfaa32 100644
--- a/include/linux/mmc/cd-gpio.h
+++ b/include/linux/mmc/slot-gpio.h
@@ -8,11 +8,11 @@
  * published by the Free Software Foundation.
  */
 
-#ifndef MMC_CD_GPIO_H
-#define MMC_CD_GPIO_H
+#ifndef MMC_SLOT_GPIO_H
+#define MMC_SLOT_GPIO_H
 
 struct mmc_host;
-int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio);
-void mmc_cd_gpio_free(struct mmc_host *host);
+int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio);
+void mmc_gpio_free_cd(struct mmc_host *host);
 
 #endif