TM4C problem with CR register

[RickKimball]

the GPIOA_Type structure declares the CR register incorrectly. It should be a:

__IO uint32_t CR;

The GPIOCR register is the commit register. The value of the GPIOCR register determines which
bits of the GPIOAFSEL, GPIOPUR, GPIOPDR, and GPIODEN registers are committed when a
write to these registers is performed. If a bit in the GPIOCR register is cleared, the data being written
to the corresponding bit in the GPIOAFSEL, GPIOPUR, GPIOPDR, or GPIODEN registers cannot
be committed and retains its previous value. If a bit in the GPIOCR register is set, the data being
written to the corresponding bit of the GPIOAFSEL, GPIOPUR, GPIOPDR, or GPIODEN registers
is committed to the register and reflects the new value.
The contents of the GPIOCR register can only be modified if the status in the GPIOLOCK register
is unlocked. Writes to the GPIOCR register are ignored if the status in the GPIOLOCK register is
locked.