* src/pic/device.c (create_pic,ram_map): add memRange entries to PIC

* src/pic/device.c (create_pic,ram_map): add memRange entries to PIC
  (pic14_getSharebankSize, pic14_getSharebankAddress): replaced with
  (pic14_hasSharebank,pic14_isShared,pic14_allRAMShared,
   pic14_getSharedStack): NEW, evaluate the memRange entries to locate
   a sharebank, use a non-shared bank for the stack if none available
* src/pic/device.h (struct memRange): added linked list next field,
  added prototypes for above functions
* src/pic/ralloc.c (initStack): handle shared and banked stacks,
  (typeRegWithIdx): accept fixed and unfixed stack registers
* src/pic/pcode.c (pCodeInitRegisters): use new functions to create
  the stack, handle shared and banked stack (except for WSAVE),
  (insertBankSel): removed useless optimization (will never fire),
  (FixRegisterBanking): added optimization for devices with only one
  possibly aliased bank of memory, like 16f84
* src/pic/glue.c (pic14_constructAbsMap): back to udata_ovr, as some
  devices have no SHAREBANK in the linker script
* device/include/pic/pic14devices.txt: documented memmap
* device/lib/pic/libdev/Makefile.in: removed --stack-loc again

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4494 4a8a32a2-be11-0410-ad9d-d568d2c75423