powerpc/8xx: Optimize verification in FixupDAR
By XORing the upper part of the instruction code, we get a value that can directly be verified with the second test and we can remove the first test. Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: NScott Wood <scottwood@freescale.com>
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