[include] add readb()/writeb() to reg.h
[include] add readb()/writeb() to reg.h

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