[llvm] Hexagon: sfmax/sfmin instructions are IEEE754-2019 (PR #139056)

[Matt Arsenault via llvm-commits]

================
@@ -2,7 +2,7 @@
 
 
 ; CHECK-LABEL: t1
-; CHECK: dfmax
+; CHECK-NOT: dfmax
----------------
arsenm wrote:

-NOT checks are next to useless, this should have positive checks 

https://github.com/llvm/llvm-project/pull/139056