Move DISTRO_DEFAULTS into boot/

This relates to booting so move it in to that Kconfig file, before
changing it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/boot/Kconfig b/boot/Kconfig
index 5f49162..170ab63 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -820,6 +820,33 @@
 
 endmenu		# Boot images
 
+config DISTRO_DEFAULTS
+	bool "Select defaults suitable for booting general purpose Linux distributions"
+	select AUTO_COMPLETE
+	select CMDLINE_EDITING
+	select CMD_BOOTI if ARM64
+	select CMD_BOOTZ if ARM && !ARM64
+	select CMD_DHCP if CMD_NET
+	select CMD_ENV_EXISTS
+	select CMD_EXT2
+	select CMD_EXT4
+	select CMD_FAT
+	select CMD_FS_GENERIC
+	select CMD_PART if PARTITIONS
+	select CMD_PING if CMD_NET
+	select CMD_PXE if NET
+	select CMD_SYSBOOT
+	select ENV_VARS_UBOOT_CONFIG
+	select HUSH_PARSER
+	select SUPPORT_RAW_INITRD
+	select SYS_LONGHELP
+	imply CMD_MII if NET
+	imply USB_STORAGE
+	imply USE_BOOTCOMMAND
+	help
+	  Select this to enable various options and commands which are suitable
+	  for building u-boot for booting general purpose Linux distributions.
+
 menu "Boot timing"
 
 config BOOTSTAGE