cmd/dist: enable VFPv3 on freebsd/arm

Since CL 165799 was merged, VFP detection should work properly on FreeBSD.

Updates #27619

Change-Id: I386e856ceb54f0bf6e6bf83bf2d1e19154ba53f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/171728
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

src/cmd/dist/util.go

@@ -397,10 +397,6 @@ func xgetgoarm() string {
 		// Conservative default for cross-compilation.
 		return "5"
 	}
-	if goos == "freebsd" {
-		// FreeBSD has broken VFP support.
-		return "5"
-	}
 
 	// Try to exec ourselves in a mode to detect VFP support.
 	// Seeing how far it gets determines which instructions failed.