MFC r342682:
rtwn_pci(4): add support for RTL8188EE chipset.
Initially based on https://reviews.freebsd.org/D15692;
later deduplicated and improved a bit (Tx reports, IQ calibration support).
Submitted by: Farhan Khan <khanzf@gmail.com>
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D15692