[ARM] Remove XFAIL on test/CodeGen/Generic/MachineBranchProb.ll

Summary: Refer PR23377. This test was XFAIL'ed for Hexagon as well as ARM. But it has now started passing for ARM.

Reviewers: hans, rengolin, aemerson, kparzysz

Subscribers: aemerson, llvm-commits, rengolin

Differential Revision: http://reviews.llvm.org/D14155

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251652 91177308-0d34-0410-b5e6-96231b3b80d8

Author: Weiming Zhao

test/CodeGen/Generic/MachineBranchProb.ll

@@ -1,8 +1,7 @@
 ; RUN: llc < %s -print-machineinstrs=expand-isel-pseudos -o /dev/null 2>&1 | FileCheck %s
 
-; ARM & AArch64 run an extra SimplifyCFG which disrupts this test.
 ; Hexagon crashes (PR23377)
-; XFAIL: arm,aarch64,hexagon
+; XFAIL: hexagon
 
 ; Make sure we have the correct weight attached to each successor.
 define i32 @test2(i32 %x) nounwind uwtable readnone ssp {