raspberrypi inclusion
category: feature
bugzilla: 50432

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If it's off, we know it will be reset on poweron, so the MMU won't
have any TLB cached from before this point.  Avoids failed waits for
MMU flush to reply.
Signed-off-by: NEric Anholt <eric@anholt.net>
(cherry picked from commit 3ee4e2e0a9e9587eacbb69b067bbc72ab2cdc47b)
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>