[PATCH REPOST] Add test for re-defining an identical label

[David Gibson]

On Tue, Jul 03, 2012 at 02:09:30PM -0600, Stephen Warren wrote:
> From: Stephen Warren <swarren at nvidia.com>
> 
> When merging one device tree over the top of a previous tree, it is
> possible to define a duplicate label that has the same name and points
> to the same property or node. This is currently allowed by the duplicate
> label checking code. However, alternative duplicate label checking
> algorithms might not allow this. Add an explicit test to ensure this
> capability is maintained.

Sorry, I've been on leave and haven't really had brainspace to think
about this.  I think you're right though, whatever else we do with
stuff we do want to allow redefinition of labels as long as they
attach to the same thing (i.e. same path, and property within that
path when applicable).  Labels within property values do get curly if
that property is altered, but that doesn't directly affect this test.

> Signed-off-by: Stephen Warren <swarren at nvidia.com>

Acked-by: David Gibson <david at gibson.dropbear.id.au>

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