Extract reading of the PPU/PCP version into tentryfile.

entfile.pas:
  + add new getversion method which uses the pointer returned by getheaderaddr to read the PPU/PCP version
ppu.pas:
  - remove GetPPUVersion method
fppu.pas, pmodules.pas, utils/ppufiles.pp, utils/ppumove.pp, utils/ppuutils/ppudump.pp
  * replace call to GetPPUVersion by call to getversion

git-svn-id: http://svn.freepascal.org/svn/fpc/branches/svenbarth@28690 3ad0048d-3df7-0310-abae-a5850022a9f2