x86/devicetree: Convert to using %pOF instead of ->full_name

x86/devicetree: Convert to using %pOF instead of ->full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each device node.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devicetree@vger.kernel.org
Link: http://lkml.kernel.org/r/20170718214339.7774-7-robh@kernel.org
[ Clarify the error message while at it, as 'node' is ambiguous. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>