Software to control the amps output through USB
From Apple Support page on USB devices:


  USB 3 devices can use up to 900mA of power (compared to 500mA used by USB 2 devices). You'll need to use a USB 3 cable to use the 900mA of power available. USB 2 cables don't support 900mA.


Your connector cable and device most likely use USB 2 interface. Not sure what phone you have, but as a side note all Apple devices and cables use USB 2 interface. This is a hardware limit, so the answer to your question is no, there is no software that can bypass the limit.