initramfs: update help text

	bool "initramfs for initial ramdisk of linux kernel"

	depends on BR2_LINUX_KERNEL

	help

	  Build a file which is usable for the gen_init_cpio tool

	  at linux kernel build.

	  This file is normally called initramfs_list and can be

	  generated with gen_initramfs_list.sh script from the root

	  directory structure.

	  The file is then used in the kernel build process to generate

	  the cpio filesystem for the initial ramdisk. Make sure that

	  you configure this file in kernel build configuration.

	  The location in the kernel build configuration menu is

	  Device Drivers -> Block devices -> Initramfs source file(s).

	  The configuration variable is CONFIG_INITRAMFS_SOURCE

	  Integrate the root filesystem generated by Buildroot as an

	  initramfs inside the kernel image. This integration will

	  take place automatically.

	  The rootfs.initramfs file generated in the images/ directory

	  is only a text file describing the contents of the initramfs

	  in a format understood by the CONFIG_INITRAMFS_SOURCE kernel

	  configuration option.

	  Note that enabling initramfs together with other filesystem

	  formats doesn't make sense: you would end up having two

	  identical root filesystems, one embedded inside the kernel

	  image, and one separatly.

comment "initramfs requires a Linux kernel to be built"

	depends on !BR2_LINUX_KERNEL