* doc/sdccman.lyx: documented numeric ranges, WEBDOC #1442369

* doc/sdccman.lyx: documented numeric ranges, WEBDOC #1442369
* device/include/ds80c390.h: added sfr16 definitions
* src/ds390/gen.c,
* src/ds390/gen.h,
* src/ds390/main.c,
* src/ds390/ralloc.c,
* src/ds390/ralloc.h: changes all over the place to sync with mcs51
  fixing several bugs and adding sfr16/sfr32, reentrant bit params,
  bit returning functions
* support/regression/tests/sfr16.c: enabled test on ds390

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4169 4a8a32a2-be11-0410-ad9d-d568d2c75423