of: dynamic: Fix spelling mistake "kojbect" -> "kobject"

There is a spelling mistake in a pr_err message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/r/20230220144422.873356-1-colin.i.king@gmail.com


Signed-off-by: Rob Herring <robh@kernel.org>