drivers: fpga controller: add eos_s3 fpga driver

This adds driver for EOS_S3 SoC FPGA.

Signed-off-by: Mateusz Sierszulski <msierszulski@internships.antmicro.com>
Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com>