raspberrypi inclusion
category: feature
bugzilla: 50432

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2711 uses a fixed 27MHz input, earlier models use the HSM clock
Signed-off-by: NDom Cobley <popcornmix@gmail.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>