Export fdt_stringlist_contains()

This function is useful outside libfdt, so export it.

Ref: DTC commit b7aa300e

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Fix typo

Ref: DTC commit cc11e522

Signed-off-by: François Revol <revol@free.fr>
Added license header to dtc/libfdt/fdt.h and libfdt_env.h

This commit adds a license header to fdt.h and libfdt_env.h
because the license was omitted.

U-Boot note: the u-boot libfdt_env.h header portion was not applied to
the u-boot libfdt_env.h because that file was created by Gerald Van Baren
(with a license header). - gvb

Ref: DTC commit 27cdc1b1

Signed-off-by: Justin Sobota <jsobota@ti.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>
Move FDT_RAMDISK_OVERHEAD from fdt.h to libfdt_env.h

The define should not have been put in fdt.h originally, libfdt_env.h
is the proper place for target-specific customizations.

Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>