rtwn: clean up empty lines in .c and .h files
rtwn(4): drop obsolete comment + use 'nop' function for 92eu calibrationRTL8192EU was not tested with previously added code.MFC after: 4 days
rtwn_usb: fix build with 'options RTWN_WITHOUT_UCODE'
Add support for the Realtek RTL8192EU chipset.Committed over the D-Link DWA-131 rev E1 on amd64 with WPA.Reviewed by: avos