K 10
svn:author
V 8
jchandra
K 8
svn:date
V 27
2016-12-17T18:04:59.399619Z
K 7
svn:log
V 379
Simplify interrupt mask programming in pl011 uart

Remove unused fields from uart_pl011_softc. Add an interrupt mask
field to the softc and use it to set the interrupt mask register.

There should be no functional change introduced here except in the
grab and ungrab functions. In these functions, we now disable and
enable all interrupts rather than just the receive interrupt.

END