ChibiOS-Tiva Code

+ Added most of the interrupt handlers and numbers for TM4C123x and TM4C129x to tiva_isr.h
+ Added PWM registers to tm4c129x.h.
+ Added defines for all TM4C123x and TM4C129x to the board.h files.
+ Added i2c 8 and 9 support (available in TM4C129x) to i2c_lld files.
+ Added gpio R, S and T to pal_lld files.
* Updated cmparams.h to check for the new device macros.
* Updated all project mcuconf.h files to match all supported peripherals.
* Updated i2c_lld driver to use new isr number and handler macros.
* Moved TIVA_GPIO_LOCK_PWD from mcuconf.h to pal_lld.c.
* Removed ';' in pal macros. They shouldn't have been there at all..
* Fixed typos in hal_ll.c and hal_lld.h for TM4C129x and removed unused commented code.