More naming changes associated with earlier renaming of LP17xx...

More naming changes associated with earlier renaming of LP17xx up_spiinitialize; LPC178x SSP support; Open1788 SSP and touchscreen support

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5811 42af7a65-404d-4744-a932-0658087f49c3