uboot-phytec

qemu-mips.h: Add CFI support

CONFIG_ENV_OVERWRITE is also added.

This patch is originally created by Jean-Christophe PLAGNIOL-VILLARD.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>