* cpu.c: Replace NO_TABLE_MOVE-support by external function
(code moved to libcpu/sparc/tbr/tbr.c).
* cpu.h: Replace NO_TABLE_MOVE-support by external function
(code moved to libcpu/sparc/tbr/tbr.h).
* sparc.h: Add sparc_init_tbr (implemented in libcpu/sparc/tbr/tbr.c).