kconfig: move initramfs options to General Setup

Move initramfs options from Device Drivers | Block Drivers to General Setup
This is a more natural place for this option.

Furthermore separate out intramfs options to usr/Kconfig

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/usr/Kconfig b/usr/Kconfig
new file mode 100644
index 0000000..07727f3
--- /dev/null
+++ b/usr/Kconfig
@@ -0,0 +1,46 @@
+#
+# Configuration for initramfs
+#
+
+config INITRAMFS_SOURCE
+	string "Initramfs source file(s)"
+	default ""
+	help
+	  This can be either a single cpio archive with a .cpio suffix or a
+	  space-separated list of directories and files for building the
+	  initramfs image.  A cpio archive should contain a filesystem archive
+	  to be used as an initramfs image.  Directories should contain a
+	  filesystem layout to be included in the initramfs image.  Files
+	  should contain entries according to the format described by the
+	  "usr/gen_init_cpio" program in the kernel tree.
+
+	  When multiple directories and files are specified then the
+	  initramfs image will be the aggregate of all of them.
+
+	  See <file:Documentation/early-userspace/README for more details.
+
+	  If you are not sure, leave it blank.
+
+config INITRAMFS_ROOT_UID
+	int "User ID to map to 0 (user root)"
+	depends on INITRAMFS_SOURCE!=""
+	default "0"
+	help
+	  This setting is only meaningful if the INITRAMFS_SOURCE is
+	  contains a directory.  Setting this user ID (UID) to something
+	  other than "0" will cause all files owned by that UID to be
+	  owned by user root in the initial ramdisk image.
+
+	  If you are not sure, leave it set to "0".
+
+config INITRAMFS_ROOT_GID
+	int "Group ID to map to 0 (group root)"
+	depends on INITRAMFS_SOURCE!=""
+	default "0"
+	help
+	  This setting is only meaningful if the INITRAMFS_SOURCE is
+	  contains a directory.  Setting this group ID (GID) to something
+	  other than "0" will cause all files owned by that GID to be
+	  owned by group root in the initial ramdisk image.
+
+	  If you are not sure, leave it set to "0".