Changing the frequency of the Arduino Due's external crystal Oscilator

Hi, I have changed the frequency of my due's external crystal oscillator from 12 MHz. to 11.0562 MHz. I can no longer program it with my USB serial port. Is there a way to change the settings of the compiler for the new crystal oscillator?

Please don't cross-post. I saw your other post saying you need 916200bps on serial... Some of the due serial ports (serial1, serial2, serial3) have HW support for a fractional brg, that probably would have allowed you to generate the bitrate you need accurately enough. It's not currently supported by the arduino libraries! but adding that support would be a lot easier than changing everything else to support a different crystal.