* src/vm/jit/reg.c (reg_setup): Removed arg{int,flt}regs stuff.

* src/vm/jit/reg.c (reg_setup): Removed arg{int,flt}regs stuff.
* src/vm/jit/reg.h (registerdata): Removed arg{int,flt}regs.

* src/vm/jit/stack.c (stack_analyse): regoff now contains the register
number instead of an offset.

* src/vm/jit/allocator/simplereg.c: Use
abi_registers_{integer,float}_argument instead of arg{int,flt}regs.

* src/vm/jit/alpha/codegen.c,
src/vm/jit/alpha/emit.c,
src/vm/jit/alpha/md-abi.c,
src/vm/jit/arm/codegen.c,
src/vm/jit/arm/emit.c,
src/vm/jit/arm/md-abi.c,
src/vm/jit/arm/md-abi.h,
src/vm/jit/i386/codegen.c,
src/vm/jit/i386/md-abi.c,
src/vm/jit/mips/codegen.c,
src/vm/jit/mips/emit.c,
src/vm/jit/mips/md-abi.c,
src/vm/jit/powerpc/codegen.c,
src/vm/jit/powerpc/emit.c,
src/vm/jit/powerpc/linux/md-abi.c,
src/vm/jit/powerpc/linux/md-abi.h,
src/vm/jit/x86_64/codegen.c,
src/vm/jit/x86_64/emit.c,
src/vm/jit/x86_64/md-abi.c: A lot of changes like the ones above.