overlay_fixup_phandle: Save entire fixup string and length
Save entire fixup string and length to use when adding to local fixups. At the end of the loop iteration, value points to the last/end of properties list. Fixes commit bdc677a4 ("libfdt: overlay_merge: Ignore unresolved symbols"). Change-Id: I2663b52aa64d37af7e31f03b4cc85c856499d841 Signed-off-by:Elliot Berman <eberman@codeaurora.org>
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