* rs6000/power9.md (power9fpdiv): New automaton and cpu_unit defined
	for it.
	(DU_C2_3_power9): Correct reservation combinations.
	(FP_DIV_power9, VEC_DIV_power9): New.
	(power9-alu): Split out rotate/shift...
	(power9-rot): ...to here, correct dispatch resource.
	(power9-cracked-alu, power9-mul, power9-mul-compare): Correct dispatch
	resource.
	(power9-fp): Correct latency.
	(power9-sdiv): Add div/sqrt resource.
	(power9-ddiv): Correct latency, add div/sqrt resource.
	(power9-sqrt, power9-dsqrt): Add div/sqrt resource.
	(power9-vecfdiv, power9-vecdiv): Correct latency, add div/sqrt
	resource.
	(power9-qpdiv, power9-qpmul): Adjust resource usage.

From-SVN: r254844