[lpc43xx][sgpio] header for serial gpio peripheral
[lpc43xx][sgpio] header for serial gpio peripheral

ErikCorryGoogle/lk,littlekernel/lk,minglun-tsai/lk,srodrig1/lk,sndnvaps/lk,sndnvaps/lk,nvll/lk,ErikCorryGoogle/lk,srodrig1/lk,nvll/lk,littlekernel/lk,srodrig1/lk,sndnvaps/lk,minglun-tsai/lk,travisg/lk,nvll/lk,minglun-tsai/lk,skabet/lk,skabet/lk,littlekernel/lk,sndnvaps/lk,srodrig1/lk,srodrig1/lk,travisg/lk,ErikCorryGoogle/lk,hollanderic/lkstuff,skabet/lk,hollanderic/lkstuff,skabet/lk,nvll/lk,nvll/lk,sndnvaps/lk,ErikCorryGoogle/lk,travisg/lk,littlekernel/lk,skabet/lk,travisg/lk,hollanderic/lkstuff,minglun-tsai/lk,hollanderic/lkstuff