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H A Dstring.cb038db852b5b7120f1ff825d8e2a5c2cd14c2f0f Sun May 22 23:03:55 UTC 2011 Matthias Weisser <weisserm@arcor.de> memcpy/memmove: Do not copy to same address

In some cases (e.g. bootm with a elf payload which is already at the right
position) there is a in place copy of data to the same address. Catching this
saves some ms while booting.

Signed-off-by: Matthias Weisser <weisserm@arcor.de>