boot: Move SYS_BOOTM_LEN to be by LEGACY_IMAGE_FORMAT

This particular option is required for booting all image types,
regardless of if we are starting an OS via command line or something
else.  Move the question for SYS_BOOTM_LEN to be by the question for
LEGACY_IMAGE_FORMAT, as that's where our generic OS questions start.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/boot/Kconfig b/boot/Kconfig
index 9ffcfb8..9378723 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -724,6 +724,17 @@
 	  event log memory region.
 endif # MEASURED_BOOT
 
+config SYS_BOOTM_LEN
+	hex "Maximum size of a decompresed OS image"
+	depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ || \
+		LEGACY_IMAGE_FORMAT || SPL_LEGACY_IMAGE_FORMAT
+	default 0x4000000 if PPC || ARM64
+	default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
+	default 0x800000
+	help
+	  This is the maximum size of the buffer that is used to decompress the OS
+	  image in to if attempting to boot a compressed image.
+
 config SUPPORT_RAW_INITRD
 	bool "Enable raw initrd images"
 	help
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 1ba6a38..ba6bfe6 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -360,17 +360,6 @@
 	help
 	  Support booting VxWorks images via the bootm command.
 
-config SYS_BOOTM_LEN
-	hex "Maximum size of a decompresed OS image"
-	depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ || \
-		   LEGACY_IMAGE_FORMAT || SPL_LEGACY_IMAGE_FORMAT
-	default 0x4000000 if PPC || ARM64
-	default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
-	default 0x800000
-	help
-	  This is the maximum size of the buffer that is used to decompress the OS
-	  image in to, if passing a compressed image to bootm/booti/bootz.
-
 config CMD_BOOTEFI
 	bool "bootefi"
 	depends on EFI_LOADER