arch/arm/src/tiva/common/tiva_timerlib.c: * tiva_gptm_configure() and tiva_gptm_release(): Fix error: Was calling tiva_emac_periphrdy() instead of tiva_gptm_periphrdy(). arch/arm/src/tiva/tiva_timer.h: * Fix error in "abcde" description of bit flag defines.