xtensa: use unflatten_and_copy_device_tree
xtensa: use unflatten_and_copy_device_tree

Use the common unflatten_and_copy_device_tree to copy the built-in FDT
out of init section.

Signed-off-by: Rob Herring <aa00819e304141d872f2e4b1c4be422ea3abbfe1@calxeda.com>
Cc: Chris Zankel <711c73f64afdce07b7e38039a96d2224209e9a6c@zankel.net>
Acked-by: Max Filippov <8c5ea195856807f4f02a6e0749c87ea6b7375f38@gmail.com>
Cc: 76026cac76fffa8b029166efa1c2d314346e1f47@linux-xtensa.org
Acked-by: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs