Convert CONFIG_ENV_IS_IN_MMC/NAND/UBI and NOWHERE to Kconfig

This converts the following to Kconfig:
   CONFIG_ENV_IS_IN_MMC
   CONFIG_ENV_IS_IN_NAND
   CONFIG_ENV_IS_IN_UBI
   CONFIG_ENV_IS_NOWHERE

In fact this already exists for sunxi as a 'choice' config. However not
all the choices are available in Kconfig yet so we cannot use that. It
would lead to more than one option being set.

In addition, one purpose of this series is to allow the environment to be
stored in more than one place. So the existing choice is converted to a
normal config allowing each option to be set independently.

There are not many opportunities for Kconfig updates to reduce the size of
this patch. This was tested with

   ./tools/moveconfig.py -i CONFIG_ENV_IS_IN_MMC

And then manual updates.  This is because for CHAIN_OF_TRUST boards they
can only have ENV_IS_NOWHERE set, so we enforce that via Kconfig logic
now.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ad2f291..ab469b3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1022,6 +1022,7 @@
 	select SPL_PINCTRL if SPL
 	select SUPPORT_SPL
 	imply FAT_WRITE
+	imply ENV_IS_IN_MMC
 	help
 	  Support for UniPhier SoC family developed by Socionext Inc.
 	  (formerly, System LSI Business Division of Panasonic Corporation)
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index c57935e..d1aa68d 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -8,6 +8,7 @@
 	bool "Exynos4 SoC family"
 	select CPU_V7
 	select BOARD_EARLY_INIT_F
+	imply ENV_IS_IN_MMC
 	help
 	  Samsung Exynos4 SoC family are based on ARM Cortex-A9 CPU. There
 	  are multiple SoCs in this family including Exynos4210, Exynos4412,
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index 1595a76..bb2ce33 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -30,6 +30,7 @@
 config MX6SX
 	select ROM_UNIFIED_SECTIONS
 	bool
+	imply ENV_IS_IN_MMC
 
 config MX6SLL
 	select ROM_UNIFIED_SECTIONS
diff --git a/arch/arm/mach-imx/mx7/Kconfig b/arch/arm/mach-imx/mx7/Kconfig
index aea8526..7053697f 100644
--- a/arch/arm/mach-imx/mx7/Kconfig
+++ b/arch/arm/mach-imx/mx7/Kconfig
@@ -13,6 +13,7 @@
 	select ROM_UNIFIED_SECTIONS
 	imply CMD_FUSE
 	bool
+	imply ENV_IS_IN_MMC
 
 choice
 	prompt "MX7 board select"
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index bd3e7d3..94412ba 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -59,6 +59,7 @@
 	select SUNXI_DRAM_DW_32BIT
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
+	imply ENV_IS_IN_MMC
 
 choice
 	prompt "Sunxi SoC Variant"
@@ -70,6 +71,7 @@
 	select ARM_CORTEX_CPU_IS_UP
 	select SUNXI_GEN_SUN4I
 	select SUPPORT_SPL
+	imply ENV_IS_IN_MMC
 
 config MACH_SUN5I
 	bool "sun5i (Allwinner A13)"
@@ -87,6 +89,7 @@
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
 	select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT
+	imply ENV_IS_IN_MMC
 
 config MACH_SUN7I
 	bool "sun7i (Allwinner A20)"
@@ -97,6 +100,7 @@
 	select SUNXI_GEN_SUN4I
 	select SUPPORT_SPL
 	select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT
+	imply ENV_IS_IN_MMC
 
 config MACH_SUN8I_A23
 	bool "sun8i (Allwinner A23)"
@@ -107,6 +111,7 @@
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
 	select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT
+	imply ENV_IS_IN_MMC
 
 config MACH_SUN8I_A33
 	bool "sun8i (Allwinner A33)"
@@ -132,6 +137,7 @@
 	select ARCH_SUPPORT_PSCI
 	select MACH_SUNXI_H3_H5
 	select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT
+	imply ENV_IS_IN_MMC
 
 config MACH_SUN8I_R40
 	bool "sun8i (Allwinner R40)"
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 89d2a49..4838758 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -60,6 +60,7 @@
 	bool "Tegra 64-bit common options"
 	select ARM64
 	select TEGRA_COMMON
+	imply ENV_IS_IN_MMC
 
 choice
 	prompt "Tegra SoC select"
@@ -77,6 +78,7 @@
 	select ARM_ERRATA_743622
 	select ARM_ERRATA_751472
 	select TEGRA_ARMV7_COMMON
+	imply ENV_IS_IN_MMC
 
 config TEGRA114
 	bool "Tegra114 family"
@@ -85,6 +87,7 @@
 config TEGRA124
 	bool "Tegra124 family"
 	select TEGRA_ARMV7_COMMON
+	imply ENV_IS_IN_MMC
 
 config TEGRA210
 	bool "Tegra210 family"
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d07b92d..579371e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -83,6 +83,7 @@
 	select CPU
 	select RAM
 	select SYSRESET
+	imply ENV_IS_NOWHERE
 
 config MACH_PIC32
 	bool "Support Microchip PIC32"