serial: fsl_lpuart: Fix typo in "transfer"

Fix two occurrences where "transfer" is spelled incorrectly.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20200818224457.16507-1-festevam@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>