tree 5977a0b01de72558dc52691a5ad4bfcf88b80d46
parent 8d2a8cc80a10e553a7a0efe17297f0e33494449a
author Masahiro Yamada <yamada.m@jp.panasonic.com> 1393840997 +0900
committer Tom Rini <trini@ti.com> 1393953331 -0500

kbuild: allow empty board directories

U-Boot has compelled all boards to have
board/${BOARD}/ or board/${VENDOR}/${BOARD}/ directory.

Sometimes it does not seem suitable for some boards,
for example Sandbox. (Is it a board?)

And arcangel4 board has nothing to compile
under the board directory.

This commit makes the build system more flexible:
If '<none>' is given to the 6th column (=Board name) of boards.cfg,
Kbuild will not descend into the board directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>