mkdtimg: fix value with wrong data endian from dtb property

Bug: 37487472
Test: cd utils/tests;./mkdtimg_testdata.sh
Change-Id: Iebc05c310a892c023d0c71862f267b083fd3a509
(cherry picked from commit 094c7b47091908698af44073ac5aaa7e89ae6027)
1 file changed