* tcg8086.g_copyvaluepara_openarray improvements:
  - use a_op_const_reg for the multiplication, instead of emitting directly
    instructions, which are 186+
  - avoid using IMUL twice, when the element size is not power of two
  - rm the system_i386_win32 leftovers



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25826 3ad0048d-3df7-0310-abae-a5850022a9f2