raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

__v4l2_ctrl_modify_range only updates the current value should
it be invalid within the new range. That can leave modes producing
odd frame rates.

Explicitly update the HBLANK and VBLANK values so that on mode
change we revert to the default frame rate for the mode.
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>