HSD #14014656595: ethernet: FEC driver for Intel FPGA E-tile Ethernet driver

commit f6baa5e6985cf1f4c98bbf335ae200068a5bb2da from
https://github.com/altera-opensource/linux-socfpga.git

 socfpga-5.15.30-lts.

This patch adds FEC driver for Intel FPGA E-tile Ethernet driver.

Signed-off-by: Tham, Mun Yew <mun.yew.tham@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>