tty/serial/fsl_lpuart: Add CONSOLE_POLL support for lpuart32.

This mirrors commit 2a41bc2a but for 32-bit register definitions.

Fix a minor typo while at it.

Signed-off-by: Marius Vlad <marius.vlad0@gmail.com>
CC: Nicolae Rosia <nicolae_rosia@mentor.com>
CC: Stefan Golinschi <stefan.golinschi@gmail.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>