* device/include/mcs51/at89c51snd1c.h: updated comments, see patch 1428901

* device/include/mcs51/c8051f330.h,
* device/include/mcs51/c8051f350.h: used () with __at, renamed IDLE,STOP to
  PCON_IDLE,PCON_STOP and added sfr16 definitions
* device/lib/_divsint.c,
* device/lib/_divuint.c,
* device/lib/_divulong.c,
* device/lib/_divulong.c: renamed a,b to x,y to avoid confusion, fixed
  register bank bug for small stackauto

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4035 4a8a32a2-be11-0410-ad9d-d568d2c75423