HSD #16020023778: net: stmmac: xgmac: EST interrupts handling and error reporting

commit 96ae0903b7e75129c056d77e52df129bc0896fee from
https://github.com/altera-opensource/linux-socfpga.git

 socfpga-6.1.55-lts.

Enabled folowing EST related interrupts:
  1) Constant Gate Control Error (CGCE)
  2) Head-of-Line Blocking due to Scheduling (HLBS)
  3) Head-of-Line Blocking due to Frame Size (HLBF)
  4) Base Time Register error (BTRE)
  5) Switch to S/W owned list Complete (SWLC)
Also add EST errors into ethtool statistic.

The commit e49aa315 ("net: stmmac: EST interrupts handling and
error reporting") and commit 9f298959 ("net: stmmac: Add EST
errors into ethtool statistic") add EST interrupts handling and error
reporting support to DWMAC5 core. This patch enables same support for
XGMAC.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>