serial: fsl_lpuart: Change DMA failure messages to debug level
Currently the following messages are seen when booting i.MX8QXP:
fsl-lpuart
5a060000.serial: DMA tx channel request failed, operating without tx DMA (-19)
fsl-lpuart
5a060000.serial: DMA rx channel request failed, operating without rx DMA (-19)
It is not really useful to have such messages on every boot, so change
them to debug level instead.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20200416153453.18825-1-festevam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>