[linux-aws] update EFA driver to version 1.4.0

[Kamal Mostafa]

Update EFA driver to version 1.4.0, and fix EFA module initialization.

BugLink: https://bugs.launchpad.net/bugs/1844166

The EFA version 1.4.0 commits are cherry-picks from the 'amzn-drivers'
github repo, not yet upstreamed.  The EFA initialization fix corrects
for a precompiled-vs-DKMS module.

The AWS EFA dev team has tested this and reported positive results.

 -Kamal