Loosen up termios interfaces to allow more flexible baud settings; remove...

Loosen up termios interfaces to allow more flexible baud settings; remove AIX-like interfaces of last check-in

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4969 42af7a65-404d-4744-a932-0658087f49c3