cmd/link: add one more linkname to the blocklist

I missed one in the previous CL.

Change-Id: I448a871523d7fb8f429b4482839d7f101ea003b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/681497
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/link/internal/loader/loader.go

@@ -2400,6 +2400,7 @@ var blockedLinknames = map[string][]string{
 	"runtime.mapdelete_faststr":  {"runtime"},
 	// New internal linknames in Go 1.25
 	// Pushed from runtime
+	"internal/cpu.riscvHWProbe":                      {"internal/cpu"},
 	"internal/runtime/cgroup.throw":                  {"internal/runtime/cgroup"},
 	"internal/runtime/maps.typeString":               {"internal/runtime/maps"},
 	"internal/synctest.IsInBubble":                   {"internal/synctest"},