raspberrypi inclusion
category: feature
bugzilla: 50432

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Clients need to know the pixel rate in order to compute exposure
and frame rate values.
Advertise it.
Signed-off-by: NDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>