env: Rename SYS_MMC_ENV_DEV to ENV_MMC_DEVICE_INDEX

Rename the variable and add ENV_ prefix, so that all configuration
options which are related to environment would have an CONFIG_ENV_
prefix. No functional change.

Use ENV_MMC_DEVICE_INDEX to clarify this is the SD/MMC device
index, a number, as enumerated by U-Boot. Update the help text
accordingly.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index d2d3e34..cfbaa47 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -802,7 +802,7 @@
 int mmc_get_env_dev(void)
 {
 	enum boot_src src = get_boot_src();
-	int dev = CONFIG_SYS_MMC_ENV_DEV;
+	int dev = CONFIG_ENV_MMC_DEVICE_INDEX;
 
 	switch (src) {
 	case BOOT_SOURCE_SD_MMC:
diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
index 37a5473..0e112af 100644
--- a/arch/arm/mach-imx/imx8/cpu.c
+++ b/arch/arm/mach-imx/imx8/cpu.c
@@ -451,7 +451,7 @@
 #ifdef CONFIG_ENV_IS_IN_MMC
 __weak int board_mmc_get_env_dev(int devno)
 {
-	return CONFIG_SYS_MMC_ENV_DEV;
+	return CONFIG_ENV_MMC_DEVICE_INDEX;
 }
 
 int mmc_get_env_dev(void)
@@ -473,7 +473,7 @@
 		break;
 	default:
 		/* If not boot from sd/mmc, use default value */
-		return CONFIG_SYS_MMC_ENV_DEV;
+		return CONFIG_ENV_MMC_DEVICE_INDEX;
 	}
 
 	return board_mmc_get_env_dev(devno);
diff --git a/arch/arm/mach-imx/imx8ulp/soc.c b/arch/arm/mach-imx/imx8ulp/soc.c
index b5dc452..ab1e1bc 100644
--- a/arch/arm/mach-imx/imx8ulp/soc.c
+++ b/arch/arm/mach-imx/imx8ulp/soc.c
@@ -56,7 +56,7 @@
 
 	if (ret != ROM_API_OKAY) {
 		puts("ROMAPI: failure at query_boot_info\n");
-		return CONFIG_SYS_MMC_ENV_DEV;
+		return CONFIG_ENV_MMC_DEVICE_INDEX;
 	}
 
 	boot_type = boot >> 16;
@@ -64,7 +64,7 @@
 
 	/* If not boot from sd/mmc, use default value */
 	if (boot_type != BOOT_TYPE_SD && boot_type != BOOT_TYPE_MMC)
-		return env_get_ulong("mmcdev", 10, CONFIG_SYS_MMC_ENV_DEV);
+		return env_get_ulong("mmcdev", 10, CONFIG_ENV_MMC_DEVICE_INDEX);
 
 	return board_mmc_get_env_dev(boot_instance);
 }
diff --git a/arch/arm/mach-imx/imx9/scmi/soc.c b/arch/arm/mach-imx/imx9/scmi/soc.c
index d2b0455..8338527 100644
--- a/arch/arm/mach-imx/imx9/scmi/soc.c
+++ b/arch/arm/mach-imx/imx9/scmi/soc.c
@@ -84,7 +84,7 @@
 		ret = scmi_get_rom_data(rdata);
 		if (ret != 0) {
 			puts("SCMI: failure at rom_boot_info\n");
-			return CONFIG_SYS_MMC_ENV_DEV;
+			return CONFIG_ENV_MMC_DEVICE_INDEX;
 		}
 	}
 	boot_type = rdata->boot_dev_type;
@@ -95,7 +95,7 @@
 
 	/* If not boot from sd/mmc, use default value */
 	if (boot_type != BOOT_TYPE_SD && boot_type != BOOT_TYPE_MMC)
-		return env_get_ulong("mmcdev", 10, CONFIG_SYS_MMC_ENV_DEV);
+		return env_get_ulong("mmcdev", 10, CONFIG_ENV_MMC_DEVICE_INDEX);
 
 	return board_mmc_get_env_dev(boot_instance);
 }
diff --git a/arch/arm/mach-imx/imx9/soc.c b/arch/arm/mach-imx/imx9/soc.c
index bb13ca7..02db7cc 100644
--- a/arch/arm/mach-imx/imx9/soc.c
+++ b/arch/arm/mach-imx/imx9/soc.c
@@ -48,8 +48,8 @@
 	return devno;
 }
 
-#ifdef CONFIG_SYS_MMC_ENV_DEV
-#define IMX9_MMC_ENV_DEV CONFIG_SYS_MMC_ENV_DEV
+#ifdef CONFIG_ENV_MMC_DEVICE_INDEX
+#define IMX9_MMC_ENV_DEV CONFIG_ENV_MMC_DEVICE_INDEX
 #else
 #define IMX9_MMC_ENV_DEV 0
 #endif
diff --git a/arch/arm/mach-imx/mmc_env.c b/arch/arm/mach-imx/mmc_env.c
index 34a7d17..2ec8ddf 100644
--- a/arch/arm/mach-imx/mmc_env.c
+++ b/arch/arm/mach-imx/mmc_env.c
@@ -10,7 +10,7 @@
 
 __weak int board_mmc_get_env_dev(int devno)
 {
-	return CONFIG_SYS_MMC_ENV_DEV;
+	return CONFIG_ENV_MMC_DEVICE_INDEX;
 }
 
 int mmc_get_env_dev(void)
@@ -22,7 +22,7 @@
 
 	/* If not boot from sd/mmc, use default value */
 	if ((boot_type != BOOT_TYPE_SD) && (boot_type != BOOT_TYPE_MMC))
-		return CONFIG_SYS_MMC_ENV_DEV;
+		return CONFIG_ENV_MMC_DEVICE_INDEX;
 
 	return board_mmc_get_env_dev(devno);
 }
diff --git a/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c
index d4a6173..90fe9e7 100644
--- a/arch/arm/mach-imx/mx6/soc.c
+++ b/arch/arm/mach-imx/mx6/soc.c
@@ -502,7 +502,7 @@
 #ifdef CONFIG_ENV_IS_IN_MMC
 __weak int board_mmc_get_env_dev(int devno)
 {
-	return CONFIG_SYS_MMC_ENV_DEV;
+	return CONFIG_ENV_MMC_DEVICE_INDEX;
 }
 
 static int mmc_get_boot_dev(void)
@@ -535,7 +535,7 @@
 
 	/* If not boot from sd/mmc, use default value */
 	if (devno < 0)
-		return CONFIG_SYS_MMC_ENV_DEV;
+		return CONFIG_ENV_MMC_DEVICE_INDEX;
 
 	return board_mmc_get_env_dev(devno);
 }
diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c
index 61d331e..5306e76 100644
--- a/arch/arm/mach-imx/mx7ulp/soc.c
+++ b/arch/arm/mach-imx/mx7ulp/soc.c
@@ -362,7 +362,7 @@
 #ifdef CONFIG_ENV_IS_IN_MMC
 __weak int board_mmc_get_env_dev(int devno)
 {
-	return CONFIG_SYS_MMC_ENV_DEV;
+	return CONFIG_ENV_MMC_DEVICE_INDEX;
 }
 
 int mmc_get_env_dev(void)
@@ -372,7 +372,7 @@
 
 	/* If not boot from sd/mmc, use default value */
 	if (get_boot_mode() == LOW_POWER_BOOT)
-		return CONFIG_SYS_MMC_ENV_DEV;
+		return CONFIG_ENV_MMC_DEVICE_INDEX;
 
 	bt1_cfg = readl(CMC1_RBASE + 0x40);
 	devno = (bt1_cfg >> 9) & 0x7;
diff --git a/arch/arm/mach-mvebu/armada8k/cpu.c b/arch/arm/mach-mvebu/armada8k/cpu.c
index 7908f75..3eb93c8 100644
--- a/arch/arm/mach-mvebu/armada8k/cpu.c
+++ b/arch/arm/mach-mvebu/armada8k/cpu.c
@@ -109,5 +109,5 @@
 		return 1;
 	}
 
-	return CONFIG_SYS_MMC_ENV_DEV;
+	return CONFIG_ENV_MMC_DEVICE_INDEX;
 }
diff --git a/arch/arm/mach-rockchip/board.c b/arch/arm/mach-rockchip/board.c
index 75d6693..2e6bb38 100644
--- a/arch/arm/mach-rockchip/board.c
+++ b/arch/arm/mach-rockchip/board.c
@@ -512,8 +512,8 @@
 	const char *boot_device;
 	struct udevice *dev;
 
-#ifdef CONFIG_SYS_MMC_ENV_DEV
-	devnum = CONFIG_SYS_MMC_ENV_DEV;
+#ifdef CONFIG_ENV_MMC_DEVICE_INDEX
+	devnum = CONFIG_ENV_MMC_DEVICE_INDEX;
 #else
 	devnum = 0;
 #endif