[arm] syscall fixes: rm dup, correct read, better call
[arm] syscall fixes: rm dup, correct read, better call

cornell-brg/pydgin,cornell-brg/pydgin,moreati/pydgin,moreati/pydgin,futurecore/pydgin,moreati/pydgin,futurecore/pydgin,cornell-brg/pydgin,futurecore/pydgin,futurecore/pydgin,moreati/pydgin,cornell-brg/pydgin