powerpc/85xx: L2 cache size wrong in 8572DS dts

It's 1MB, not 512KB.  Newer U-Boots will fix this entry, but that's no
reason to have the wrong value in the dts.

Signed-off-by: Trent Piepho <tpiepho@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
1 file changed