Make sure UART3, where the console is, is called ttyS2. That is
consistent with the early console.

Link: https://lore.kernel.org/r/20191031163455.1711872-5-lkundrak@v3.skSigned-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Olof Johansson <olof@lixom.net>