[X86] Incorrect throughput for FP divide in Znver1 scheduler model

[topperc]

Bugzilla Link	36897
Version	trunk
OS	All
Blocks	#31672
CC	@RKSimon

Extended Description

I don't think this is right

; ZNVER1-LABEL: test_divps:
; ZNVER1: # %bb.0:
; ZNVER1-NEXT: vdivps %xmm1, %xmm0, %xmm0 # sched: [15:1.00]
; ZNVER1-NEXT: vdivps (%rdi), %xmm0, %xmm0 # sched: [22:1.00]
; ZNVER1-NEXT: retq # sched: [1:0.50]

[RKSimon]

This was fixed by bddbd40