Squashed 'driver-examples/mss/mss-watchdog/' changes from ed7e588..d7…

…f9aa2

d7f9aa2 Add the correct file with small case sgmii.
8c1f81e Delete the files which have same name except the SGMII capitalization. This causes compilation issues.

git-subtree-dir: driver-examples/mss/mss-watchdog
git-subtree-split: d7f9aa2e81cb372df918006cbb13e64885f3d400