kernel: add pending e1000e fixes

kernel: add pending e1000e fixes

The previous round of fixes for the 82574 chip cause an issue with
emulated e1000e devices in VMware ESXi 6.5. It also contains changes
that are not strictly necessary. These patches fix the issues introduced
in the previous series, revert the unnecessary changes to avoid
unforeseen fallout, and avoid a case where interrupts can be missed.

The final two patches of this series are already in the kernel, so no
need to include them here.

Patchwork: https://patchwork.ozlabs.org/cover/881776/

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>