spi: spi-fsl-lpspi: downgrade log level for pio mode

spi: spi-fsl-lpspi: downgrade log level for pio mode

[ Upstream commit d5786c88cacbb859f465e8e93c26154585c1008d ]

Having no DMA is not an error. The simplest reason is not having it
configured. SPI will still be usable, so raise a warning instead to
get still some attention.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230531072850.739021-1-alexander.stein@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 003c7e01916c ("spi: spi-fsl-lpspi: Use IRQF_NO_AUTOEN flag in request_irq()")
Signed-off-by: Sasha Levin <sashal@kernel.org>