We don't need a dependency on this variable changing, and having one
causes locked signature warnings during eSDK installation if you have
INITRAMFS_IMAGE_* set (since TOPDIR will always be different between
the eSDK and the environment in which it was built).
Relates to [YOCTO #12102].
(From OE-Core master rev: 073610af04be326f9245ca91714526b390fb72cd)
(From OE-Core rev: 94a9f9a7dc5a736b7986b889895c736f02110715)
(From OE-Core rev: 8bf158857d7c597c58efc4023bdd9c2785d43ad3)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
779228d7a4