const golang.org/x/sys/unix.PPPIOCGMRU

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L205: 	PPPIOCGMRU                       = 0x80047453

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)