ARM: dts: Fix label address for 64MiB OpenBMC flash layout

Signed-off-by: George Liu <liuxiwei@inspur.com>
Reviewed-by: John Wang <wangzhiqiang.bj@bytedance.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20201022081002.2665132-1-liuxiwei@inspur.com


Signed-off-by: Joel Stanley <joel@jms.id.au>