bfin.opt (micplb): New option.

bfin.opt (micplb): New option.

	* config/bfin/bfin.opt (micplb): New option.
	* config/bfin/linux.h (SUBTARGET_DRIVER_SELF_SPECS): Set it.
	* config/bfin/bfin-protos.h (WA_INDIRECT_CALLS,
	ENABLE_WA_INDIRECT_CALLS): New macros.
	* config/bfin/bfin.c (bfin_cpus): Add WA_INDIRECT_CALLS to
	all 54x CPUs.
	(indirect_call_p): New function.
	(workaround_speculation): Handle anomaly 05-00-0426 when
	ENABLE_WA_INDIRECT_CALLS is true.
	* config/bfin/bfin.h (TARGET_CPU_CPP_BUILTINS): Define
	__WORKAROUND_INDIRECT_CALLS if ENABLE_WA_INDIRECT_CALLS.
	* doc/invoke.texi (Blackfin Options): Document -micplb.

From-SVN: r142240