ipa: rpi: PDAF data parse increases platform judgment

Because PI5 and PI 4 embedded data have different alignments,
we need to determine whether alignment is required based
on platform information.

ipa: rpi: pisp: Add OV64A40 tuning file

Provide the OV64A40 tuning files for the Arducam Omnivision camera
module to operate on the PiSP ISP architecture on Raspberry Pi5.

ipa: raspberrypi Store the target string in the controller

Store the target string provided by the camera tuning files in the
controller state.

ipa: raspberrrypi: Add PDAF support for Arducam64MP

Add PDAF support for Arducam64MP, if you need to use PDAF function,
you need to use Arducam64MP driver with PDAF enabled.

pipeline: raspberrypi: Add setting timeout through environment variables

It is used in external trigger mode to prevent the program from exiting overtime.

Use as follows

export LIBCAMERA_SET_TIMEOUT

ipa: raspberrrypi: Add PDAF support for IMX519

Add PDAF support for IMX519, if you need to use PDAF function,
you need to use IMX519 driver with PDAF enabled.

README: Add arducam-pivariety-sdk-dev installation instructions

To build libcamera, need to install arducam-pivariety-sdk-dev library.