The two main changes here are:
* a bugfix to deal with DT paths which contain a common, which are
perfectly valid and quite common.
* support for the /chosen/stdout-path device tree property, which
allows Xen to find a boot console without manual configuration
if presented with a suitable device tree. Juno and Seattle both
contain the node in the dt supplied with the upstream Linux
kernel (not sure about their factory kernel), as do a bunch of
non-virt capable arm devices, but with stdout-path support being
added to Linux in v3.19-rc1 I expect that number will soon grow.
I think "dt-uart: use ':' as separator between path and options"
should be a candidate for stable backport.
Since last time: removed back compat support for ',', constify, warn if
stdout-path is truncated.
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