LPC17xx serial now supports minimal termios ioctls; serial driver ioctl...

LPC17xx serial now supports minimal termios ioctls; serial driver ioctl methods should not set errno variable

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4994 42af7a65-404d-4744-a932-0658087f49c3