cmd/dist: port to linux/loong64 completed

For #46229

Change-Id: I5c207482d0a2cfb3a66f7e293cf413a5b54daa26
Reviewed-on: https://go-review.googlesource.com/c/go/+/397074
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
index f99f1f4..0a7af2b 100644
--- a/src/cmd/dist/build.go
+++ b/src/cmd/dist/build.go
@@ -1602,7 +1602,6 @@
 // filtered out of cgoEnabled for 'dist list'. See golang.org/issue/28944
 var incomplete = map[string]bool{
 	"linux/sparc64": true,
-	"linux/loong64": true,
 }
 
 // List of platforms which are first class ports. See golang.org/issue/38874.