HSD #14014656595: net: ethernet: altera: add ethtool support for Intel FPGA E-tile Ethernet driver

commit 75bf9140265541b09923b7ad6ffa658103545091 from
https://github.com/altera-opensource/linux-socfpga.git

 socfpga-5.15.30-lts.

This patch adds ethtool support 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>