Changed some peripheral register structures in tm4c123x.h and tm4c129x.h to reduce the amount of duplicated text.
Updated gpt_lld, i2c_lld, pal_lld, pwm_lld, serial_lld, hal_lld register access to the changed peripheral register structures.
Replaced old interrupt numbers from tm4c123x.h and tm4c129x.h in serial_lld.c with the new interrupt number defines from tiva_isr.h.