K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2015-11-18T06:24:21.694649Z
K 7
svn:log
V 345
uart(4) - make the 8250 uart baudrate tolerance build time tweakable.

It turns out on a 16550 w/ a 25MHz SoC reference clock you get a little
over 3% error at 115200 baud, which causes this to fail.

Just .. cope. Things cope these days.

Default to 30 (3.0%) as before, but allow UART_DEV_TOLERANCE_PCT to be
set at build time to change that.

END