+ Added method taddnode.use_generic_mul64bit, allowing it to inline full 64-bit multiplications, and fixed ARM to comply (it was not checking for possible 32x32 to 64 optimization after detecting a 64-bit operand, so recently added code for 32x32 to 64 bit optimization was inactive).

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26500 3ad0048d-3df7-0310-abae-a5850022a9f2