cmd_mem: fix cp command
The "cp" command has not worked since commit 0628ab8e, because of the following lines, which set the destination and the source to the same address. buf = map_sysmem(addr, bytes); src = map_sysmem(addr, bytes); Tested-by: NTom Rini <trini@ti.com> Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
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