K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2017-05-01T19:47:10.757063Z
K 7
svn:log
V 217
Make some UART consoles to not spin wait for data to be sent.

At least with Tx FIFO enabled it shows me ~10% reduction of verbose boot
time with serial console at 115200 baud.

Reviewed by:	marcel
MFC after:	2 weeks

END