* arch/arm/src/tiva/Make.defs: Compile only when enabled by configuration CONFIG_ARM_SEMIHOSTING_HOSTFS * arch/arm/src/common/up_hostfs.c: Remove the ifdef conditional because it's redundant with the make logic.
* arch/arm/src/tiva/Make.defs: Compile only when enabled by configuration CONFIG_ARM_SEMIHOSTING_HOSTFS * arch/arm/src/common/up_hostfs.c: Remove the ifdef conditional because it's redundant with the make logic.