Rationale: In terms of firmware programming, there is no functional difference between these parts:
TM4C123GH6PMI7
TM4C123GH6PMI7R
TM4C123GH6PMT7
TM4C123GH6PMT7R
From a programming standpoint, all of the above parts are TM4C123GH6PM, which means it doesn't make sense to differentiate between PM and PMI. (The PM means 64-LQFP. The I means temperature range -40C to +85C. It could be T meaning -40C to +105C. The R means it ships in Tape and Reel packaging as opposed to Tray.)
arch/arm/include/tiva/chip.h:
arch/arm/include/tiva/tm4c_irq.h:
arch/arm/src/tiva/hardware/lm/lm3s_flash.h:
arch/arm/src/tiva/hardware/tm4c/tm4c_pinmap.h:
configs/tm4c123g-launchpad/README.txt:
configs/tm4c123g-launchpad/nsh/defconfig:
Rename: CONFIG_ARCH_CHIP_TM4C123GH6PMI to CONFIG_ARCH_CHIP_TM4C123GH6PM
arch/arm/src/tiva/Kconfig:
configs/Kconfig:
Rename: ARCH_CHIP_TM4C123GH6PMI to ARCH_CHIP_TM4C123GH6PM
arch/arm/src/tiva/hardware/tm4c/tm4c_memorymap.h:
Rename: CONFIG_ARCH_CHIP_TM4C123GH6PMI to CONFIG_ARCH_CHIP_TM4C123GH6PM
Remove redundant Peripheral Base Addresses section. There were two identical copies, one for CONFIG_ARCH_CHIP_TM4C123GH6PMI and another for CONFIG_ARCH_CHIP_TM4C123GH6PM.