This reverts commit 1a67653d, which caused a boot regression.

The behavior of the "drive-push-pull" in the kernel does not
match what the binding document describes. Revert Rob's patch
to make the DT match the kernel again, rather than the binding.

Link: https://lore.kernel.org/lkml/YlVAy95eF%2F9b1nmu@orome/Reported-by: NThierry Reding <thierry.reding@gmail.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>