powerpc/ppc4xx: Adjust environment size on neo

Environment size on neo has to be 0x20000 for compatibilty reasons.

Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
1 file changed