raspberrypi inclusion
category: feature
bugzilla: 50432

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When the MMC isn't plugged in, the driver will spam the console which is
pretty annoying when using NFS.
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>