wip: fix compilation errors on new uart architecture

quad/src/quad_app/callbacks.c

quad/src/quad_app/communication.c

quad/src/quad_app/initialize_components.c

quad/src/quad_app/quad_app.c

quad/xsdk_workspace/real_quad/src/hw_impl_zybo.c

quad/xsdk_workspace/real_quad/src/hw_impl_zybo.h

quad/xsdk_workspace/real_quad/src/hw_impl_zybo_gps.c

quad/xsdk_workspace/real_quad/src/hw_impl_zybo_i2c.c

quad/xsdk_workspace/real_quad/src/hw_impl_zybo_tests.c

quad/xsdk_workspace/real_quad/src/hw_impl_zybo_uart.c