firmware: get rid of unused "xxx_sleep()" storage driver function

storage_sleepnow() is the one that is actually implemented
by storage drivers. storage_sleep() sends a Q_STORAGE_SLEEP
event to the storage thread, which will normally end up
calling the driver's sleepnow() function.

Change-Id: Ib6523073348431dcc75c0f10ef99060c6960efd8

firmware/drivers/ramdisk.c

@@ -74,10 +74,6 @@ long ramdisk_last_disk_activity(void)
     return last_disk_activity;
 }
 
-void ramdisk_sleep(void)
-{
-}
-
 void ramdisk_spin(void)
 {
 }

firmware/drivers/sd.c

@@ -23,10 +23,6 @@
 #include "sdmmc.h"
 #include "storage.h"
 
-void sd_sleep(void)
-{
-}
-
 void sd_spin(void)
 {
 }

firmware/export/ata.h

@@ -132,7 +132,6 @@ struct storage_info;
 
 void ata_enable(bool on);
 void ata_spindown(int seconds);
-void ata_sleep(void);
 void ata_sleepnow(void);
 /* NOTE: DO NOT use this to poll for disk activity.
          If you are waiting for the disk to become active before

firmware/export/mmc.h

@@ -30,7 +30,6 @@ struct storage_info;
 
 void mmc_enable(bool on);
 void mmc_spindown(int seconds);
-void mmc_sleep(void);
 void mmc_sleepnow(void);
 bool mmc_disk_is_active(void);
 int mmc_soft_reset(void);

firmware/export/nand.h

@@ -30,7 +30,6 @@ struct storage_info;
 
 void nand_enable(bool on);
 void nand_spindown(int seconds);
-void nand_sleep(void);
 void nand_sleepnow(void);
 bool nand_disk_is_active(void);
 int  nand_soft_reset(void);

firmware/export/ramdisk.h

@@ -30,7 +30,6 @@ struct storage_info;
 
 void ramdisk_enable(bool on);
 void ramdisk_spindown(int seconds);
-void ramdisk_sleep(void);
 bool ramdisk_disk_is_active(void);
 int ramdisk_soft_reset(void);
 int ramdisk_init(void) STORAGE_INIT_ATTR;

firmware/export/sd.h

@@ -36,7 +36,6 @@ struct storage_info;
 
 void sd_enable(bool on);
 void sd_spindown(int seconds);
-void sd_sleep(void);
 void sd_sleepnow(void);
 bool sd_disk_is_active(void);
 int  sd_soft_reset(void);

firmware/target/arm/ata-nand-telechips.c

@@ -1010,10 +1010,6 @@ long nand_last_disk_activity(void)
     return last_disk_activity;
 }
 
-void nand_sleep(void)
-{
-}
-
 void nand_spin(void)
 {
 }

firmware/target/arm/imx233/sdmmc-imx233.c

@@ -1000,10 +1000,6 @@ void mmc_enable(bool on)
     (void) on;
 }
 
-void mmc_sleepnow(void)
-{
-}
-
 bool mmc_disk_is_active(void)
 {
     return false;

firmware/target/arm/rk27xx/ata-nand-rk27xx.c

@@ -56,11 +56,6 @@ void nand_spindown(int seconds)
     (void)seconds;
 }
 
-void nand_sleep(void)
-{
-    nand_power_down();
-}
-
 void nand_sleepnow(void)
 {
     nand_power_down();

firmware/target/arm/s5l8700/ata-nand-s5l8700.c

@@ -50,10 +50,6 @@ void nand_spindown(int seconds)
     (void)seconds;
 }
 
-void nand_sleep(void)
-{
-}
-
 void nand_sleepnow(void)
 {
     nand_power_down();

firmware/target/mips/ingenic_jz47xx/ata-nand-jz4740.c

@@ -695,11 +695,6 @@ void nand_spindown(int seconds)
     (void)seconds;
 }
 
-void nand_sleep(void)
-{
-    /* null */
-}
-
 void nand_spin(void)
 {
     /* null */

firmware/target/mips/ingenic_jz47xx/ata-nand-jz4760.c

@@ -630,11 +630,6 @@ void nand_spindown(int seconds)
     (void)seconds;
 }
 
-void nand_sleep(void)
-{
-    /* null */
-}
-
 void nand_spin(void)
 {
     /* null */