cmd/internal/obj: remove redundant cnames on loong64

Change-Id: I5aa6328a12e74b2801ab60b5a5bb8571d382d5ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/425301
Reviewed-by: xiaodong liu <[email protected]>
Reviewed-by: Meidan Li <[email protected]>
Reviewed-by: WANG Xuerui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Run-TryBot: Emmanuel Odeke <[email protected]>
Auto-Submit: Emmanuel Odeke <[email protected]>
Reviewed-by: Matthew Dempsky <[email protected]>

Author: abner-chenc

src/cmd/internal/obj/loong64/cnames.go

@@ -4,11 +4,11 @@
 
 package loong64
 
+// This order should be strictly consistent to that in a.out.go.
 var cnames0 = []string{
 	"NONE",
 	"REG",
 	"FREG",
-	"FCREG",
 	"FCSRREG",
 	"FCCREG",
 	"ZCON",